Dataset Summary

mMARCO is a multilingual version of the MS MARCO passage ranking dataset. For more information, checkout our papers:

The first (deprecated) version comprises 8 languages: Chinese, French, German, Indonesian, Italian, Portuguese, Russian and Spanish. The current version included translations for Japanese, Dutch, Vietnamese, Hindi and Arabic. The current version is composed of 14 languages (including the original English version).

Supported languages

Language name	Language code
English	english
Chinese	chinese
French	french
German	german
Indonesian	indonesian
Italian	italian
Portuguese	portuguese
Russian	russian
Spanish	spanish
Arabic	arabic
Dutch	dutch
Hindi	hindi
Japanese	japanese
Vietnamese	vietnamese

Dataset Structure

You can load mMARCO dataset by choosing a specific language. We include training triples (query, positive and negative example), the translated collections of documents and queries.

Training triples

>>> dataset = load_dataset('unicamp-dl/mmarco', 'english')
>>> dataset['train'][1]
{'query': 'what fruit is native to australia', 'positive': 'Passiflora herbertiana. A rare passion fruit native to Australia. Fruits are green-skinned, white fleshed, with an unknown edible rating. Some sources list the fruit as edible, sweet and tasty, while others list the fruits as being bitter and inedible.assiflora herbertiana. A rare passion fruit native to Australia. Fruits are green-skinned, white fleshed, with an unknown edible rating. Some sources list the fruit as edible, sweet and tasty, while others list the fruits as being bitter and inedible.', 'negative': 'The kola nut is the fruit of the kola tree, a genus (Cola) of trees that are native to the tropical rainforests of Africa.'}

Queries

>>> dataset = load_dataset('unicamp-dl/mmarco', 'queries-spanish')
>>> dataset['train'][1]
{'id': 634306, 'text': '¿Qué significa Chattel en el historial de crédito'}

Collection

>>> dataset = load_dataset('unicamp-dl/mmarco', 'collection-portuguese')
>>> dataset['collection'][100]
{'id': 100, 'text': 'Antonín Dvorák (1841-1904) Antonin Dvorak era filho de açougueiro, mas ele não seguiu o negócio de seu pai. Enquanto ajudava seu pai a meio tempo, estudou música e se formou na Escola de Órgãos de Praga em 1859.'}

Citation Information

@misc{bonifacio2021mmarco,
      title={mMARCO: A Multilingual Version of MS MARCO Passage Ranking Dataset}, 
      author={Luiz Henrique Bonifacio and Vitor Jeronymo and Hugo Queiroz Abonizio and Israel Campiotti and Marzieh Fadaee and  and Roberto Lotufo and Rodrigo Nogueira},
      year={2021},
      eprint={2108.13897},
      archivePrefix={arXiv},
      primaryClass={cs.CL}
}