---
pretty_name: CoNLL-03
task_categories:
  - token-classification
task_ids:
  - named-entity-recognition
language:
  - en
configs:
  - config_name: default
data_files:
  train: data/train.parquet
  validation: data/validation.parquet
  test: data/test.parquet
---

# CoNLL-03

A classic benchmark dataset for English Named Entity Recognition (NER) with entity types PER, ORG, LOC, and MISC.

- **Size:** small, clean, ready to use  
- **Source:** loaded with `datasets v3.6` (metadata + files)  
- **Format:** stored in Parquet  
- **Compatibility:** 🧩 works with `datasets >= 4.0` (script loaders deprecated)

## Reference

Sang, E. F., & De Meulder, F. (2003).  
*Introduction to the CoNLL-2003 Shared Task: Language-Independent Named Entity Recognition.*  
[ACL Anthology](https://aclanthology.org/W03-0419/)