Sub-tasks: extractive-qa
Languages: Chinese
Multilinguality: monolingual
Size Categories: 10K<n<100K
Language Creators: crowdsourced
Annotations Creators: crowdsourced
Source Datasets: original
cmrc2018 /
albertvillanova's picture
Convert dataset sizes from base 2 to base 10 in the dataset card (#2)
  - crowdsourced
  - crowdsourced
  - zh
  - cc-by-sa-4.0
  - monolingual
  - 10K<n<100K
  - original
  - question-answering
  - extractive-qa
paperswithcode_id: cmrc-2018
pretty_name: Chinese Machine Reading Comprehension 2018
    - name: id
      dtype: string
    - name: context
      dtype: string
    - name: question
      dtype: string
    - name: answers
        - name: text
          dtype: string
        - name: answer_start
          dtype: int32
    - name: train
      num_bytes: 15508110
      num_examples: 10142
    - name: validation
      num_bytes: 5183809
      num_examples: 3219
    - name: test
      num_bytes: 1606931
      num_examples: 1002
  download_size: 11508117
  dataset_size: 22298850

Dataset Card for "cmrc2018"

Table of Contents

Dataset Description

Dataset Summary

A Span-Extraction dataset for Chinese machine reading comprehension to add language diversities in this area. The dataset is composed by near 20,000 real questions annotated on Wikipedia paragraphs by human experts. We also annotated a challenge set which contains the questions that need comprehensive understanding and multi-sentence inference throughout the context.

Supported Tasks and Leaderboards

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Dataset Structure

Data Instances


  • Size of downloaded dataset files: 11.50 MB
  • Size of the generated dataset: 22.31 MB
  • Total amount of disk used: 33.83 MB

An example of 'validation' looks as follows.

This example was too long and was cropped:

    "answers": {
        "answer_start": [11, 11],
        "text": ["光荣和ω-force", "光荣和ω-force"]
    "context": "\"《战国无双3》()是由光荣和ω-force开发的战国无双系列的正统第三续作。本作以三大故事为主轴,分别是以武田信玄等人为主的《关东三国志》,织田信长等人为主的《战国三杰》,石田三成等人为主的《关原的年轻武者》,丰富游戏内的剧情。此部份专门介绍角色,欲知武...",
    "id": "DEV_0_QUERY_0",
    "question": "《战国无双3》是由哪两个公司合作开发的?"

Data Fields

The data fields are the same among all splits.


  • id: a string feature.
  • context: a string feature.
  • question: a string feature.
  • answers: a dictionary feature containing:
    • text: a string feature.
    • answer_start: a int32 feature.

Data Splits

name train validation test
default 10142 3219 1002

Dataset Creation

Curation Rationale

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Source Data

Initial Data Collection and Normalization

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Who are the source language producers?

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Annotation process

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Who are the annotators?

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Personal and Sensitive Information

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Considerations for Using the Data

Social Impact of Dataset

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Discussion of Biases

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Other Known Limitations

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Additional Information

Dataset Curators

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Licensing Information

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Citation Information

    title = "A Span-Extraction Dataset for {C}hinese Machine Reading Comprehension",
    author = "Cui, Yiming  and
      Liu, Ting  and
      Che, Wanxiang  and
      Xiao, Li  and
      Chen, Zhipeng  and
      Ma, Wentao  and
      Wang, Shijin  and
      Hu, Guoping",
    booktitle = "Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP)",
    month = nov,
    year = "2019",
    address = "Hong Kong, China",
    publisher = "Association for Computational Linguistics",
    url = "",
    doi = "10.18653/v1/D19-1600",
    pages = "5886--5891",


Thanks to @patrickvonplaten, @mariamabarham, @lewtun, @thomwolf for adding this dataset.