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asnq.py
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# coding=utf-8
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# Copyright 2020 The HuggingFace Datasets Authors and the current dataset script contributor.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Answer-Sentence Natural Questions (ASNQ)
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ASNQ is a dataset for answer sentence selection derived from Google's
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Natural Questions (NQ) dataset (Kwiatkowski et al. 2019). It converts
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NQ's dataset into an AS2 (answer-sentence-selection) format.
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The dataset details can be found in the paper at
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https://arxiv.org/abs/1911.04118
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The dataset can be downloaded at
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https://d3t7erp6ge410c.cloudfront.net/tanda-aaai-2020/data/asnq.tar
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"""
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import csv
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import os
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import datasets
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_CITATION = """\
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@article{garg2019tanda,
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title={TANDA: Transfer and Adapt Pre-Trained Transformer Models for Answer Sentence Selection},
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author={Siddhant Garg and Thuy Vu and Alessandro Moschitti},
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year={2019},
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eprint={1911.04118},
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}
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"""
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_DESCRIPTION = """\
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ASNQ is a dataset for answer sentence selection derived from
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Google's Natural Questions (NQ) dataset (Kwiatkowski et al. 2019).
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Each example contains a question, candidate sentence, label indicating whether or not
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the sentence answers the question, and two additional features --
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sentence_in_long_answer and short_answer_in_sentence indicating whether ot not the
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candidate sentence is contained in the long_answer and if the short_answer is in the candidate sentence.
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For more details please see
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https://arxiv.org/pdf/1911.04118.pdf
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and
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https://research.google/pubs/pub47761/
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"""
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_URL = "data/asnq.zip"
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class ASNQ(datasets.GeneratorBasedBuilder):
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"""ASNQ is a dataset for answer sentence selection derived
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ASNQ is a dataset for answer sentence selection derived from
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Google's Natural Questions (NQ) dataset (Kwiatkowski et al. 2019).
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The dataset details can be found in the paper:
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https://arxiv.org/abs/1911.04118
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"""
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VERSION = datasets.Version("1.0.0")
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def _info(self):
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return datasets.DatasetInfo(
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# This is the description that will appear on the datasets page.
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description=_DESCRIPTION,
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# This defines the different columns of the dataset and their types
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features=datasets.Features(
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{
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"question": datasets.Value("string"),
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"sentence": datasets.Value("string"),
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"label": datasets.ClassLabel(names=["neg", "pos"]),
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"sentence_in_long_answer": datasets.Value("bool"),
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"short_answer_in_sentence": datasets.Value("bool"),
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}
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),
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# No default supervised_keys
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supervised_keys=None,
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# Homepage of the dataset for documentation
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homepage="https://github.com/alexa/wqa_tanda#answer-sentence-natural-questions-asnq",
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citation=_CITATION,
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)
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def _split_generators(self, dl_manager):
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"""Returns SplitGenerators."""
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# dl_manager is a datasets.download.DownloadManager that can be used to
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# download and extract URLs
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dl_dir = dl_manager.download_and_extract(_URL)
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data_dir = os.path.join(dl_dir, "data", "asnq")
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return [
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datasets.SplitGenerator(
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name=datasets.Split.TRAIN,
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# These kwargs will be passed to _generate_examples
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gen_kwargs={
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"filepath": os.path.join(data_dir, "train.tsv"),
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"split": "train",
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},
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),
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datasets.SplitGenerator(
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name=datasets.Split.VALIDATION,
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# These kwargs will be passed to _generate_examples
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gen_kwargs={
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"filepath": os.path.join(data_dir, "dev.tsv"),
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"split": "dev",
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},
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),
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]
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def _generate_examples(self, filepath, split):
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"""Yields examples.
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Original dataset contains labels '1', '2', '3' and '4', with labels
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'1', '2' and '3' considered negative (sentence does not answer the question),
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and label '4' considered positive (sentence does answer the question).
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We map these labels to two classes, returning the other properties as additional
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features."""
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# Mapping of dataset's original labels to a tuple of
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# (label, sentence_in_long_answer, short_answer_in_sentence)
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label_map = {
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"1": ("neg", False, False),
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"2": ("neg", False, True),
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"3": ("neg", True, False),
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"4": ("pos", True, True),
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}
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with open(filepath, encoding="utf-8") as tsvfile:
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tsvreader = csv.reader(tsvfile, delimiter="\t")
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for id_, row in enumerate(tsvreader):
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question, sentence, orig_label = row
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label, sentence_in_long_answer, short_answer_in_sentence = label_map[orig_label]
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yield id_, {
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"question": question,
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"sentence": sentence,
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"label": label,
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"sentence_in_long_answer": sentence_in_long_answer,
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"short_answer_in_sentence": short_answer_in_sentence,
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}
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