Datasets:

eriktks
/

conll2003

	---
	annotations_creators:
	- crowdsourced
	language_creators:
	- found
	language:
	- en
	license:
	- other
	multilinguality:
	- monolingual
	size_categories:
	- 10K<n<100K
	source_datasets:
	- extended\|other-reuters-corpus
	task_categories:
	- token-classification
	task_ids:
	- named-entity-recognition
	- part-of-speech
	paperswithcode_id: conll-2003
	pretty_name: CoNLL-2003
	dataset_info:
	features:
	- name: id
	dtype: string
	- name: tokens
	sequence: string
	- name: pos_tags
	sequence:
	class_label:
	names:
	'0': '"'
	'1': ''''''
	'2': '#'
	'3': $
	'4': (
	'5': )
	'6': ','
	'7': .
	'8': ':'
	'9': '``'
	'10': CC
	'11': CD
	'12': DT
	'13': EX
	'14': FW
	'15': IN
	'16': JJ
	'17': JJR
	'18': JJS
	'19': LS
	'20': MD
	'21': NN
	'22': NNP
	'23': NNPS
	'24': NNS
	'25': NN\|SYM
	'26': PDT
	'27': POS
	'28': PRP
	'29': PRP$
	'30': RB
	'31': RBR
	'32': RBS
	'33': RP
	'34': SYM
	'35': TO
	'36': UH
	'37': VB
	'38': VBD
	'39': VBG
	'40': VBN
	'41': VBP
	'42': VBZ
	'43': WDT
	'44': WP
	'45': WP$
	'46': WRB
	- name: chunk_tags
	sequence:
	class_label:
	names:
	'0': O
	'1': B-ADJP
	'2': I-ADJP
	'3': B-ADVP
	'4': I-ADVP
	'5': B-CONJP
	'6': I-CONJP
	'7': B-INTJ
	'8': I-INTJ
	'9': B-LST
	'10': I-LST
	'11': B-NP
	'12': I-NP
	'13': B-PP
	'14': I-PP
	'15': B-PRT
	'16': I-PRT
	'17': B-SBAR
	'18': I-SBAR
	'19': B-UCP
	'20': I-UCP
	'21': B-VP
	'22': I-VP
	- name: ner_tags
	sequence:
	class_label:
	names:
	'0': O
	'1': B-PER
	'2': I-PER
	'3': B-ORG
	'4': I-ORG
	'5': B-LOC
	'6': I-LOC
	'7': B-MISC
	'8': I-MISC
	config_name: conll2003
	splits:
	- name: train
	num_bytes: 6931345
	num_examples: 14041
	- name: validation
	num_bytes: 1739223
	num_examples: 3250
	- name: test
	num_bytes: 1582054
	num_examples: 3453
	download_size: 982975
	dataset_size: 10252622
	train-eval-index:
	- config: conll2003
	task: token-classification
	task_id: entity_extraction
	splits:
	train_split: train
	eval_split: test
	col_mapping:
	tokens: tokens
	ner_tags: tags
	metrics:
	- type: seqeval
	name: seqeval
	---

	# Dataset Card for "conll2003"

	## Table of Contents
	- [Dataset Description](#dataset-description)
	- [Dataset Summary](#dataset-summary)
	- [Supported Tasks and Leaderboards](#supported-tasks-and-leaderboards)
	- [Languages](#languages)
	- [Dataset Structure](#dataset-structure)
	- [Data Instances](#data-instances)
	- [Data Fields](#data-fields)
	- [Data Splits](#data-splits)
	- [Dataset Creation](#dataset-creation)
	- [Curation Rationale](#curation-rationale)
	- [Source Data](#source-data)
	- [Annotations](#annotations)
	- [Personal and Sensitive Information](#personal-and-sensitive-information)
	- [Considerations for Using the Data](#considerations-for-using-the-data)
	- [Social Impact of Dataset](#social-impact-of-dataset)
	- [Discussion of Biases](#discussion-of-biases)
	- [Other Known Limitations](#other-known-limitations)
	- [Additional Information](#additional-information)
	- [Dataset Curators](#dataset-curators)
	- [Licensing Information](#licensing-information)
	- [Citation Information](#citation-information)
	- [Contributions](#contributions)

	## Dataset Description

	- Homepage: [https://www.aclweb.org/anthology/W03-0419/](https://www.aclweb.org/anthology/W03-0419/)
	- Repository: [More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
	- Paper: [More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
	- Point of Contact: [More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
	- Size of downloaded dataset files: 4.85 MB
	- Size of the generated dataset: 10.26 MB
	- Total amount of disk used: 15.11 MB

	### Dataset Summary

	The shared task of CoNLL-2003 concerns language-independent named entity recognition. We will concentrate on
	four types of named entities: persons, locations, organizations and names of miscellaneous entities that do
	not belong to the previous three groups.

	The CoNLL-2003 shared task data files contain four columns separated by a single space. Each word has been put on
	a separate line and there is an empty line after each sentence. The first item on each line is a word, the second
	a part-of-speech (POS) tag, the third a syntactic chunk tag and the fourth the named entity tag. The chunk tags
	and the named entity tags have the format I-TYPE which means that the word is inside a phrase of type TYPE. Only
	if two phrases of the same type immediately follow each other, the first word of the second phrase will have tag
	B-TYPE to show that it starts a new phrase. A word with tag O is not part of a phrase. Note the dataset uses IOB2
	tagging scheme, whereas the original dataset uses IOB1.

	For more details see https://www.clips.uantwerpen.be/conll2003/ner/ and https://www.aclweb.org/anthology/W03-0419

	### Supported Tasks and Leaderboards

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Languages

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	## Dataset Structure

	### Data Instances

	#### conll2003

	- Size of downloaded dataset files: 4.85 MB
	- Size of the generated dataset: 10.26 MB
	- Total amount of disk used: 15.11 MB

	An example of 'train' looks as follows.

	```
	{
	"chunk_tags": [11, 12, 12, 21, 13, 11, 11, 21, 13, 11, 12, 13, 11, 21, 22, 11, 12, 17, 11, 21, 17, 11, 12, 12, 21, 22, 22, 13, 11, 0],
	"id": "0",
	"ner_tags": [0, 3, 4, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
	"pos_tags": [12, 22, 22, 38, 15, 22, 28, 38, 15, 16, 21, 35, 24, 35, 37, 16, 21, 15, 24, 41, 15, 16, 21, 21, 20, 37, 40, 35, 21, 7],
	"tokens": ["The", "European", "Commission", "said", "on", "Thursday", "it", "disagreed", "with", "German", "advice", "to", "consumers", "to", "shun", "British", "lamb", "until", "scientists", "determine", "whether", "mad", "cow", "disease", "can", "be", "transmitted", "to", "sheep", "."]
	}
	```

	The original data files have `-DOCSTART-` lines used to separate documents, but these lines are removed here.
	Indeed `-DOCSTART-` is a special line that acts as a boundary between two different documents, and it is filtered out in this implementation.

	### Data Fields

	The data fields are the same among all splits.

	#### conll2003
	- `id`: a `string` feature.
	- `tokens`: a `list` of `string` features.
	- `pos_tags`: a `list` of classification labels (`int`). Full tagset with indices:

	```python
	{'"': 0, "''": 1, '#': 2, '$': 3, '(': 4, ')': 5, ',': 6, '.': 7, ':': 8, '``': 9, 'CC': 10, 'CD': 11, 'DT': 12,
	'EX': 13, 'FW': 14, 'IN': 15, 'JJ': 16, 'JJR': 17, 'JJS': 18, 'LS': 19, 'MD': 20, 'NN': 21, 'NNP': 22, 'NNPS': 23,
	'NNS': 24, 'NN\|SYM': 25, 'PDT': 26, 'POS': 27, 'PRP': 28, 'PRP$': 29, 'RB': 30, 'RBR': 31, 'RBS': 32, 'RP': 33,
	'SYM': 34, 'TO': 35, 'UH': 36, 'VB': 37, 'VBD': 38, 'VBG': 39, 'VBN': 40, 'VBP': 41, 'VBZ': 42, 'WDT': 43,
	'WP': 44, 'WP$': 45, 'WRB': 46}
	```

	- `chunk_tags`: a `list` of classification labels (`int`). Full tagset with indices:

	```python
	{'O': 0, 'B-ADJP': 1, 'I-ADJP': 2, 'B-ADVP': 3, 'I-ADVP': 4, 'B-CONJP': 5, 'I-CONJP': 6, 'B-INTJ': 7, 'I-INTJ': 8,
	'B-LST': 9, 'I-LST': 10, 'B-NP': 11, 'I-NP': 12, 'B-PP': 13, 'I-PP': 14, 'B-PRT': 15, 'I-PRT': 16, 'B-SBAR': 17,
	'I-SBAR': 18, 'B-UCP': 19, 'I-UCP': 20, 'B-VP': 21, 'I-VP': 22}
	```

	- `ner_tags`: a `list` of classification labels (`int`). Full tagset with indices:

	```python
	{'O': 0, 'B-PER': 1, 'I-PER': 2, 'B-ORG': 3, 'I-ORG': 4, 'B-LOC': 5, 'I-LOC': 6, 'B-MISC': 7, 'I-MISC': 8}
	```

	### Data Splits

	\| name \|train\|validation\|test\|
	\|---------\|----:\|---------:\|---:\|
	\|conll2003\|14041\| 3250\|3453\|

	## Dataset Creation

	### Curation Rationale

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Source Data

	#### Initial Data Collection and Normalization

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	#### Who are the source language producers?

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Annotations

	#### Annotation process

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	#### Who are the annotators?

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Personal and Sensitive Information

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	## Considerations for Using the Data

	### Social Impact of Dataset

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Discussion of Biases

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Other Known Limitations

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	## Additional Information

	### Dataset Curators

	[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)

	### Licensing Information

	From the [CoNLL2003 shared task](https://www.clips.uantwerpen.be/conll2003/ner/) page:

	> The English data is a collection of news wire articles from the Reuters Corpus. The annotation has been done by people of the University of Antwerp. Because of copyright reasons we only make available the annotations. In order to build the complete data sets you will need access to the Reuters Corpus. It can be obtained for research purposes without any charge from NIST.

	The copyrights are defined below, from the [Reuters Corpus page](https://trec.nist.gov/data/reuters/reuters.html):

	> The stories in the Reuters Corpus are under the copyright of Reuters Ltd and/or Thomson Reuters, and their use is governed by the following agreements:
	>
	> [Organizational agreement](https://trec.nist.gov/data/reuters/org_appl_reuters_v4.html)
	>
	> This agreement must be signed by the person responsible for the data at your organization, and sent to NIST.
	>
	> [Individual agreement](https://trec.nist.gov/data/reuters/ind_appl_reuters_v4.html)
	>
	> This agreement must be signed by all researchers using the Reuters Corpus at your organization, and kept on file at your organization.

	### Citation Information

	```
	@inproceedings{tjong-kim-sang-de-meulder-2003-introduction,
	title = "Introduction to the {C}o{NLL}-2003 Shared Task: Language-Independent Named Entity Recognition",
	author = "Tjong Kim Sang, Erik F. and
	De Meulder, Fien",
	booktitle = "Proceedings of the Seventh Conference on Natural Language Learning at {HLT}-{NAACL} 2003",
	year = "2003",
	url = "https://www.aclweb.org/anthology/W03-0419",
	pages = "142--147",
	}

	```


	### Contributions

	Thanks to [@jplu](https://github.com/jplu), [@vblagoje](https://github.com/vblagoje), [@lhoestq](https://github.com/lhoestq) for adding this dataset.