Describe IPCC confidence scale

README.md

@@ -22,6 +22,13 @@ We introduce the **ICCS dataset (IPCC Confidence in Climate Statements)** is a n
 
 Each statement is labeled with the corresponding IPCC report source, the page number in the report PDF, and the corresponding confidence level (, along with their associated confidence levels (`low`, `medium`, `high`, or `very high`) as assessed by IPCC climate scientists based on available evidence and agreement among their peers. 
 
+## IPCC confidence assessment scale
+
+![](ipcc-scales.png)
+
+Source: [IPCC AR6 Working Group I report](https://www.ipcc.ch/report/ar6/wg1/)
+
+
 ## Dataset Construction
 
 To construct the dataset, we retrieved the complete raw text from each of the three IPCC report PDFs that are available online using an open-source library [pypdf2](https://pypi.org/project/PyPDF2/). We then normalized the whitespace, tokenized the text into sentences using [NLTK](https://www.nltk.org/) , and used regex search to filter for complete sentences including a parenthetical confidence label at the end of the statement, of the form _sentence (low|medium|high|very high confidence)_. The final ICCS dataset contains 8094 labeled sentences. 
@@ -43,7 +50,7 @@ Of note: while the IPCC report uses a 5 levels scale for confidence, almost no `
 
 ## Code Download
 
-The code to reproduce dataset collection and our LLM benchmarking experiments is avalaible on [GitHub](https://github.com/rlacombe/Climate-LLMs).
+The code to reproduce dataset collection and our LLM benchmarking experiments is [released on GitHub](https://github.com/rlacombe/Climate-LLMs).
 
 ## Paper