Dataset Card for "conll2000"

Dataset Summary

Text chunking consists of dividing a text in syntactically correlated parts of words. For example, the sentence He reckons the current account deficit will narrow to only # 1.8 billion in September . can be divided as follows: [NP He ] [VP reckons ] [NP the current account deficit ] [VP will narrow ] [PP to ] [NP only # 1.8 billion ] [PP in ] [NP September ] .

Text chunking is an intermediate step towards full parsing. It was the shared task for CoNLL-2000. Training and test data for this task is available. This data consists of the same partitions of the Wall Street Journal corpus (WSJ) as the widely used data for noun phrase chunking: sections 15-18 as training data (211727 tokens) and section 20 as test data (47377 tokens). The annotation of the data has been derived from the WSJ corpus by a program written by Sabine Buchholz from Tilburg University, The Netherlands.

Supported Tasks and Leaderboards

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Languages

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Dataset Structure

Data Instances

conll2000

• Size of downloaded dataset files: 3.48 MB
• Size of the generated dataset: 6.55 MB
• Total amount of disk used: 10.03 MB

An example of 'train' looks as follows.

This example was too long and was cropped:

{
    "chunk_tags": [11, 13, 11, 12, 21, 22, 22, 22, 22, 11, 12, 12, 17, 11, 12, 13, 11, 0, 1, 13, 11, 11, 0, 21, 22, 22, 11, 12, 12, 13, 11, 12, 12, 11, 12, 12, 0],
    "id": "0",
    "pos_tags": [19, 14, 11, 19, 39, 27, 37, 32, 34, 11, 15, 19, 14, 19, 22, 14, 20, 5, 15, 14, 19, 19, 5, 34, 32, 34, 11, 15, 19, 14, 20, 9, 20, 24, 15, 22, 6],
    "tokens": "[\"Confidence\", \"in\", \"the\", \"pound\", \"is\", \"widely\", \"expected\", \"to\", \"take\", \"another\", \"sharp\", \"dive\", \"if\", \"trade\", \"figur..."
}

Data Fields

The data fields are the same among all splits.

conll2000

• id: a string feature.
• tokens: a list of string features.
• pos_tags: a list of classification labels, with possible values including '' (0), # (1), $ (2), ( (3), ) (4).
• chunk_tags: a list of classification labels, with possible values including O (0), B-ADJP (1), I-ADJP (2), B-ADVP (3), I-ADVP (4).

Data Splits

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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Annotations

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

@inproceedings{tksbuchholz2000conll,
   author     = "Tjong Kim Sang, Erik F. and Sabine Buchholz",
   title      = "Introduction to the CoNLL-2000 Shared Task: Chunking",
   editor     = "Claire Cardie and Walter Daelemans and Claire
                 Nedellec and Tjong Kim Sang, Erik",
   booktitle  = "Proceedings of CoNLL-2000 and LLL-2000",
   publisher  = "Lisbon, Portugal",
   pages      = "127--132",
   year       = "2000"
}

Contributions

Thanks to @vblagoje, @jplu for adding this dataset.