joao-luz/mariner

This is the MariNER (Mapeamento e Anotações de Registros hIstóricos para NER) dataset, a Named Entity Recognition dataset for Brazilian Portuguese in the historical domain, presented in the paper MariNER: A Dataset for Historical Brazilian Portuguese Named Entity Recognition. The dataset consists of five documents from early 20th Century on expeditions through Brazil's Northeast region. The documents were manually annotated with four entity types: Person, Location, Date and Organization. They were also divided into sentences and tokenized.

The dataset is available in the BIO format, with the following distinct labels and corresponding indices:

Label	Tag
0	O
1	B-PESSOA
2	I-PESSOA
3	B-LOCAL
4	I-LOCAL
5	B-DATA
6	I-DATA
7	B-ORGANIZACAO
8	I-ORGANIZACAO

The dataset is also available in Github at https://github.com/Joao-Luz/mariner

To cite this work, use:

 @misc {
      sarcinelli2025marinerdatasethistoricalbrazilian,
      title={MariNER: A Dataset for Historical Brazilian Portuguese Named Entity Recognition}, 
      author={João Lucas Luz Lima Sarcinelli and Marina Lages Gonçalves Teixeira and Jade Bortot de Paiva and Diego Furtado Silva},
      year={2025},
      eprint={2506.23051},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2506.23051}, 
}