conversations
listlengths
2
3
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "“The Summer Scorcher issue” of V Magazine features sexy star if \"Iron Man 2.\".\n\nClick through for a preview of the June ...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "I took a week off from ( paying ) work last week and spent the time at home catching up on various projects that had accumul...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Siberia is a huge territory in Russia. It is more...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Un comité indépendant, distinct de la commission,...
[ { "from": "system", "value": "You should describe the task and explain your answer. While answering a multiple choice question, first output the correct answer(s). Then explain why other answers are wrong. Think like you are answering to a five year old." }, { "from": "user", "value": "See the m...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "american soldiers are at a remote site in the mountains of eastern afghanistan to determine whether senior al-qaida figures ...
[ { "from": "system", "value": "Explain how you used the definition to come up with the answer." }, { "from": "user", "value": "In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify this question-answer pair into two categories...
[ { "from": "system", "value": "You are a teacher. Given a task, you explain in simple steps what the task is asking, any guidelines it provides and how to use those guidelines to find the answer." }, { "from": "user", "value": "Read the given text and if it has abusive content then indicate via \...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Generate an approximately fifteen-word sentence t...
[ { "from": "system", "value": "Explain how you used the definition to come up with the answer." }, { "from": "user", "value": "Given a 'poster' sentence and a corresponding 'response' (often, from Facebook or Reddit)classify the sentiment of the given response into four categories: 1) Positive, 2...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Here is a dialogue:\nSally: Hi sorry but I can't make it on Monday - my mum has been taken into hospital.\nAnna: Oh no! What...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "What happens when you can't pay your lawyer?\n\nWhy are lawyers called associates? Aren't they employees of a firm?\n\nPleas...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "The adults had ribs and beer . Melanie and Codie ...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Read the following article and answer the questio...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Who played Cardinal Wolsey in the 1971 film ‘Carry On Henry’?" }, { "from": "gpt", "value": "<SUMMARY>\nIn the 1...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "What was claimed by Sir Humphrey Gilbert in 1583 as Britain's first overseas colony?" }, { "from": "gpt", "value...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "- KMFDM (originally Kein Mehrheit Für Die Mitleid, \"loosely\" translated by the band as \"no pity for the majority\") i...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Are there any waterproof inks for fountain pens?\nHow do I make fountain pen ink?\nWould you say that these questions are th...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Title: Britax Review: Disappointed that the manual was mounted to the seat in a way that made it impossible to read. I had to cut it off just...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Teacher:Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "News article:\n\nFor our latest mission, we brought the movie Ghostbusters to life in the reading room of The New York Public Library at ...
[ { "from": "system", "value": "You are an AI assistant that follows instruction extremely well. Help as much as you can." }, { "from": "user", "value": "Read the following context and answer the question. Context: U.S. President Donald Trump on Thursday threatened tariffs on an additional $100 bi...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Read the text and determine if the sentence is tr...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Lightingdesigningeriatricareasrequiresalotofexperienceandintuition.\nWhat's a sentence that uses these characters?" }, { "from": ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Northwoods Community Secondary School - Northwoods Community Secondary School (NCSS) is an American charter school in Rhinelander Wisconsin....
[ { "from": "system", "value": "You should describe the task and explain your answer. While answering a multiple choice question, first output the correct answer(s). Then explain why other answers are wrong. Think like you are answering to a five year old." }, { "from": "user", "value": "Choose th...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "It's a good thing he didn't go with \"@andrew.\" Drew Olanoff wants to benefit the LiveStrong charity because of the support...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Большинство квартир расположены в местах с высокоразвитой инфраструктурой, куда включены магазины различной направленности, небольшие, ую...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Read the following context and choose the correct option to answer the question. Context: SEOUL, SOUTH KOREA — North Korea human rights advoc...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "In 1969, Schwarzenegger met Barbara Outland (later Barbara Outland Baker), an English teacher he lived with until 1974. Schwarzenegger ta...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Based on this review, would the user recommend th...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Bolt (comicsCharacter), creator, Ernie Colón\n\nW...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Translate \"Brother Man Okay, good show Master Ip\" to Czech?" }, { "from": "gpt", "value": "<SUMMARY>\nThe task...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Here's a logic test: Marie rides her motorcycle to work. She rides it across the sand and onto the concrete. When she rides her motorcycle ac...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "The NTC is trying to minimize revenge killings, a Libyan dissident says. Libya's rebel government: It will take 18 to 20 mon...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "What type of details about james g. mitchell can be gathered from the following bio? Bio: james george `` jim '' mitchell -lrb- born 25...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "Do you think the right answer to the question \"what happens when animals and plants evolve to environmental conditions?...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Is it possible to conclude that \"A young boy with no shirt and white shorts.\" if \"A young boy is wearing shorts at the be...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Went to Bandara tonight. We ordered the prime ri...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Translate the following sentence to German:\nThis...
[ { "from": "system", "value": "You are an AI assistant that follows instruction extremely well. Help as much as you can." }, { "from": "user", "value": "Given this review: \"Update newer popular songs Can't find most of the songs I've been searching for lately.\" Would you recommend this app to a...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "What is the solution?\n\nSolve 0 = 98*m + 7341 - 4009 for m." }, { "from": "gpt", "value": "<SUMMARY>\nThe task requires solv...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Read the following paragraph and extract the answer for the question: What is the full name of the singer that had the 1,000th number-one sin...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "- Singoli is a block and a nagar panchayat in Neemuch district in the Indian state of Madhya Pradesh. - Harsud was a town and municipality i...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Write a sentence based on this summary: spanish taxi drivers join protests over fuel costs" }, { "from": "gpt", "value": "<SU...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Read the text and determine if the sentence is tr...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Песня Arden Jann Hanging by a Thread представлена...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Summarize this article:\n\nImagine this situation for a moment. You are a pilot preparing for landing. You’ve checked airspeed, alerted c...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "How is \"It is true that this issue has raised very important issues in terms of security.\" said in Romanian?" }, { "from": "gpt...
[ { "from": "system", "value": "User will you give you a task with some instruction. Your job is follow the instructions as faithfully as you can. While answering think step-by-step and justify your answer." }, { "from": "user", "value": "Given a passage with a context and an answer, construct a q...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "How many girls escape from the sorority house? If there is no answer, please output \"Insufficient information to provide an answer.\". Movie...
[ { "from": "system", "value": "You are an AI assistant that follows instruction extremely well. Help as much as you can." }, { "from": "user", "value": "In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Is the question \"How large is Missouri 's popula...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Translate to Finnish:\n\nMr Florenz, I can assure you that, in the course of the three-way discussion which we shall have to...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Mabanda is a city located near the southernmost tip of Tanzania , close to the Burundi border .\nMabanda is a city located close to the s...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "name = The Waterman, eatType = restaurant, food = Italian, priceRange = £20-25, customer rating = high, area = riverside, fa...
[ { "from": "system", "value": "You should describe the task and explain your answer. While answering a multiple choice question, first output the correct answer(s). Then explain why other answers are wrong. Think like you are answering to a five year old." }, { "from": "user", "value": "Multi-cho...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Here is some data: Grenadier Guards, battle, Battle of Waterloo.\n\nWrite a sentence that describes this data." }, { "from": "gpt...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Is there a negative or positive tone to this product review? === Title: Westlife is the best Review: I absolutly love Westlife and all their ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must give a long and detailed answer." }, { "from": "user", "value": "Pick from: A. Yes B. No\n\nTitle: Might I add Review: Dear Consumer,This product happens to be a very good game. Not only does it express you...
[ { "from": "system", "value": "You should describe the task and explain your answer. While answering a multiple choice question, first output the correct answer(s). Then explain why other answers are wrong. Think like you are answering to a five year old." }, { "from": "user", "value": "Possible ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Generate an approximately fifteen-word sentence that describes all this data: Alimentum eatType restaurant; Alimentum food English; Alime...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "What is likely to happen to a parasite if it kills its host? Read this paragraph and choose the correct option from th...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Read the following article and answer the questio...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Aleksandr Prudnikov played youth football for FC Spartak Moscow, who are based at the Otkrytiye Arena. He later represented ...
[ { "from": "system", "value": "You should describe the task and explain your answer. While answering a multiple choice question, first output the correct answer(s). Then explain why other answers are wrong. Think like you are answering to a five year old." }, { "from": "user", "value": "Excellent...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "A.F.C. Fylde, numberOfMembers, 3180\n\nWhat is sentence that verbalizes this data?" }, { "from": "gpt", "value": "<SUMMARY>\n...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Based on the premise \"well yeah i've heard uh so...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Does the sentence \"Various methods have been used in the history of the American colonies and the United States but only fi...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Determine if the sentence is true based on the text below:\nThe 2016 Paris ePrix was held in the spring time.\n\nThe 2016 Paris ePrix (of...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Process: - When water freezes it becomes 10% big...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "This image belongs to the following categories Sk...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Are the following two questions the same?\nWhat i...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "How does the next paragraph end?\n\nThere's a lady news anchor for abc news standing next to a large flat screen television set, presenti...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "I can use this background: Greenhouse Effect: The...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "What key details about hermann oppenheim can be extracted from the following bio? Bio: hermann oppenheim -lrb- 1 january 1858 -- 5 may ...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "What concepts are described in the following sentence?\n\n\"Moderate prices you can find at Alimentum, near Yippee Noodle Ba...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "to access your favorite table, log in to the titan poker lobby and look for the my favorites tab on the main menu bar at the left side.\n...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "How is \"However, it seems that many people will not be completely satisfied until all of the national budgets are transferr...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "Teacher:You are given a math word problem and you are supposed to make use of mathematical concepts like probability, co...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Given a sentence in French, generate a new French...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Background: Kim was born Han Jae-joon (hanjaejun; Han Zai Jun ) in Gongju, Chungcheongnam-do, South Korea. His real birthday, as revealed...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Holland America Line is a British/American-owned cruise line, a subsidiary of Carnival Corporation & plc. Originating in the...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "San Marco 1, also known as San Marco A, was the f...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Write the last sentence in this story.\n\nBeijing (CNN)For years China has been the envy of the world, hailed as the great '...
[ { "from": "system", "value": "You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer." }, { "from": "user", "value": "A storm was coming and everyone was panicking so Taylor set their minds at ease. Given the context: Why did Taylor do t...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "A Slew of Staph Infections Tackles the NFL\nThe NFL is learning the hard way that a microscopic foe can be much more imposing than a 300-...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "What is the answer to this question? who dies in ...
[ { "from": "system", "value": "You are an AI assistant that follows instruction extremely well. Help as much as you can." }, { "from": "user", "value": "Select from: -- No; -- Yes;\nGiven those answer options, answer the question: I am verifying the answers generated by an automatic system to the...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "Washington (CNN) -- The Pacific island nation of Palau has agreed to take in 17 Chinese Muslims held at the U.S. prison camp...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Shortly after pleading not guilty Tuesday to charges related to sensational allegations of hush money payments and lying to federal agent...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Q: What are the two main minerals found in ocean ...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "How to succeed in secondary school (england )<br>Get your new uniform. New year 7s will need to purchase their uniform for secondary scho...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "AMERICAN consumers will be hit by another quarter...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "Please answer the following question about this m...
[ { "from": "system", "value": "You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps." }, { "from": "user", "value": "The person worked hard and achieved his goals and...
[ { "from": "system", "value": "You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old." }, { "from": "user", "value": "name = Loch Fyne, eatType = restaurant, priceRange = less than £20, familyFriendly = no\n\nCan you represent the content in ...
[ { "from": "system", "value": "You are an AI assistant that follows instruction extremely well. Help as much as you can." }, { "from": "user", "value": "Given a sentence in Italian, generate a new Italian sentence by performing small changes on the sentence. Here, make sure that the changes are s...
[ { "from": "system", "value": "You are an AI assistant. You will be given a task. You must generate a detailed and long answer." }, { "from": "user", "value": "Read the following article and select the best answer. Article: 1. The Wright Brothers, by David McCullough Another must-read for history...