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---
license: cc-by-4.0
task_categories:
- token-classification
language:
- bn
- de
- en
- es
- fa
- hi
- ko
- nl
- ru
- tr
- zh
- multilingual
tags:
- multiconer
- ner
- multilingual
- named entity recognition
size_categories:
- 100K<n<1M
dataset_info:
- config_name: bn
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
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  - name: validation
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- config_name: de
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  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
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- config_name: en
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  - name: id
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  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
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          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
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- config_name: es
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  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
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          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
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- config_name: fa
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  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
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          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
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- config_name: hi
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
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          '3': B-LOC
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          '5': B-CORP
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          '7': B-GRP
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- config_name: ko
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
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          '5': B-CORP
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          '7': B-GRP
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- config_name: mix
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  - name: id
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  - name: tokens
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  - name: ner_tags
    sequence:
      class_label:
        names:
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          '7': B-GRP
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- config_name: multi
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
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          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
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          '9': B-PROD
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          '11': B-CW
          '12': I-CW
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- config_name: nl
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
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  - name: validation
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  - name: test
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- config_name: ru
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
          '8': I-GRP
          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
  splits:
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  - name: validation
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  - name: test
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  download_size: 54587257
  dataset_size: 53052185
- config_name: tr
  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
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          '9': B-PROD
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          '11': B-CW
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  - name: validation
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  features:
  - name: id
    dtype: int32
  - name: tokens
    sequence: string
  - name: ner_tags
    sequence:
      class_label:
        names:
          '0': O
          '1': B-PER
          '2': I-PER
          '3': B-LOC
          '4': I-LOC
          '5': B-CORP
          '6': I-CORP
          '7': B-GRP
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          '9': B-PROD
          '10': I-PROD
          '11': B-CW
          '12': I-CW
  splits:
  - name: train
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  - name: validation
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  - name: test
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  download_size: 36101525
  dataset_size: 35559142
---

# Multilingual Complex Named Entity Recognition (MultiCoNER) 

## Dataset Summary
MultiCoNER (version 1) is a large multilingual dataset for Named Entity Recognition that covers 3 domains (Wiki sentences, questions, and search queries) across 11 languages, as well as multilingual and code-mixing subsets. This dataset is designed to represent contemporary challenges in NER, including low-context scenarios (short and uncased text), syntactically complex entities like movie titles, and long-tail entity distributions. The 26M token dataset is compiled from public resources using techniques such as heuristic-based sentence sampling, template extraction and slotting, and machine translation. 

See the [AWS Open Data Registry entry for MultiCoNER](https://registry.opendata.aws/multiconer/) for more information.

## Labels
* `PER`: Person, i.e. names of people
* `LOC`: Location, i.e. locations/physical facilities
* `CORP`: Corporation, i.e. corporations/businesses
* `GRP`: Groups, i.e. all other groups
* `PROD`: Product, i.e. consumer products
* `CW`: Creative Work, i.e. movies/songs/book titles

### Dataset Structure
The dataset follows the IOB format of CoNLL. In particular, it uses the following label to ID mapping:
```python

{
    "O": 0,
    "B-PER": 1,
    "I-PER": 2,
    "B-LOC": 3,
    "I-LOC": 4,
    "B-CORP": 5,
    "I-CORP": 6,
    "B-GRP": 7,
    "I-GRP": 8,
    "B-PROD": 9,
    "I-PROD": 10,
    "B-CW": 11,
    "I-CW": 12,
}
```

## Languages
The MultiCoNER dataset consists of the following languages: Bangla, German, English, Spanish, Farsi, Hindi, Korean, Dutch, Russian, Turkish and Chinese.

## Usage
```python
from datasets import load_dataset

dataset = load_dataset('tomaarsen/MultiCoNER', 'multi')
```

## License

CC BY 4.0

## Citation
```
@misc{malmasi2022multiconer,
    title={MultiCoNER: A Large-scale Multilingual dataset for Complex Named Entity Recognition}, 
    author={Shervin Malmasi and Anjie Fang and Besnik Fetahu and Sudipta Kar and Oleg Rokhlenko},
    year={2022},
    eprint={2208.14536},
    archivePrefix={arXiv},
    primaryClass={cs.CL}
}
```