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"""MAFAND-MT: Masakhane Anglo and Franco Africa News Dataset for Machine Translation""" |
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import datasets |
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import json |
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logger = datasets.logging.get_logger(__name__) |
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_CITATION = """\ |
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@inproceedings{adelani-etal-2022-thousand, |
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title = "A Few Thousand Translations Go a Long Way! Leveraging Pre-trained Models for {A}frican News Translation", |
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author = "Adelani, David and |
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Alabi, Jesujoba and |
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Fan, Angela and |
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Kreutzer, Julia and |
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Shen, Xiaoyu and |
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Reid, Machel and |
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Ruiter, Dana and |
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Klakow, Dietrich and |
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Nabende, Peter and |
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Chang, Ernie and |
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Gwadabe, Tajuddeen and |
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Sackey, Freshia and |
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Dossou, Bonaventure F. P. and |
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Emezue, Chris and |
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Leong, Colin and |
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Beukman, Michael and |
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Muhammad, Shamsuddeen and |
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Jarso, Guyo and |
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Yousuf, Oreen and |
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Niyongabo Rubungo, Andre and |
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Hacheme, Gilles and |
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Wairagala, Eric Peter and |
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Nasir, Muhammad Umair and |
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Ajibade, Benjamin and |
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Ajayi, Tunde and |
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Gitau, Yvonne and |
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Abbott, Jade and |
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Ahmed, Mohamed and |
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Ochieng, Millicent and |
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Aremu, Anuoluwapo and |
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Ogayo, Perez and |
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Mukiibi, Jonathan and |
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Ouoba Kabore, Fatoumata and |
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Kalipe, Godson and |
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Mbaye, Derguene and |
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Tapo, Allahsera Auguste and |
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Memdjokam Koagne, Victoire and |
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Munkoh-Buabeng, Edwin and |
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Wagner, Valencia and |
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Abdulmumin, Idris and |
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Awokoya, Ayodele and |
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Buzaaba, Happy and |
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Sibanda, Blessing and |
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Bukula, Andiswa and |
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Manthalu, Sam", |
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booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies", |
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month = jul, |
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year = "2022", |
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address = "Seattle, United States", |
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publisher = "Association for Computational Linguistics", |
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url = "https://aclanthology.org/2022.naacl-main.223", |
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doi = "10.18653/v1/2022.naacl-main.223", |
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pages = "3053--3070", |
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abstract = "Recent advances in the pre-training for language models leverage large-scale datasets to create multilingual models. However, low-resource languages are mostly left out in these datasets. This is primarily because many widely spoken languages that are not well represented on the web and therefore excluded from the large-scale crawls for datasets. Furthermore, downstream users of these models are restricted to the selection of languages originally chosen for pre-training. This work investigates how to optimally leverage existing pre-trained models to create low-resource translation systems for 16 African languages. We focus on two questions: 1) How can pre-trained models be used for languages not included in the initial pretraining? and 2) How can the resulting translation models effectively transfer to new domains? To answer these questions, we create a novel African news corpus covering 16 languages, of which eight languages are not part of any existing evaluation dataset. We demonstrate that the most effective strategy for transferring both additional languages and additional domains is to leverage small quantities of high-quality translation data to fine-tune large pre-trained models.", |
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} |
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""" |
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_DESCRIPTION = """\ |
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MAFAND-MT is the largest MT benchmark for African languages in the news domain, covering 21 languages. The languages covered are: |
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- Amharic |
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- Bambara |
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- Ghomala |
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- Ewe |
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- Fon |
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- Hausa |
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- Igbo |
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- Kinyarwanda |
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- Luganda |
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- Luo |
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- Mossi |
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- Nigerian-Pidgin |
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- Chichewa |
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- Shona |
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- Swahili |
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- Setswana |
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- Twi |
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- Wolof |
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- Xhosa |
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- Yoruba |
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- Zulu |
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The train/validation/test sets are available for 16 languages, and validation/test set for amh, kin, nya, sna, and xho |
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For more details see https://aclanthology.org/2022.naacl-main.223/ |
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""" |
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_URL = "https://raw.githubusercontent.com/masakhane-io/lafand-mt/main/data/json_files/" |
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_TRAINING_FILE = "train.json" |
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_DEV_FILE = "dev.json" |
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_TEST_FILE = "test.json" |
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class MafandConfig(datasets.BuilderConfig): |
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"""BuilderConfig for Mafand""" |
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def __init__(self, **kwargs): |
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"""BuilderConfig for Masakhaner. |
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Args: |
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**kwargs: keyword arguments forwarded to super. |
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""" |
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super(MafandConfig, self).__init__(**kwargs) |
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class Mafand(datasets.GeneratorBasedBuilder): |
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"""Mafand dataset.""" |
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BUILDER_CONFIGS = [ |
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MafandConfig(name="en-amh", version=datasets.Version("1.0.0"), |
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description="Mafand English-Amharic dataset"), |
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MafandConfig(name="en-hau", version=datasets.Version("1.0.0"), |
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description="Mafand English-Hausa dataset"), |
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MafandConfig(name="en-ibo", version=datasets.Version("1.0.0"), |
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description="Mafand English-Igbo dataset"), |
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MafandConfig(name="en-kin", version=datasets.Version("1.0.0"), |
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description="Mafand English-Kinyarwanda dataset"), |
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MafandConfig(name="en-lug", version=datasets.Version("1.0.0"), |
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description="Mafand English-Luganda dataset"), |
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MafandConfig(name="en-nya", version=datasets.Version("1.0.0"), |
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description="Mafand English-Chichewa dataset"), |
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MafandConfig(name="en-pcm", version=datasets.Version("1.0.0"), |
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description="Mafand English-Naija dataset"), |
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MafandConfig(name="en-sna", version=datasets.Version("1.0.0"), |
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description="Mafand English-Shona dataset"), |
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MafandConfig(name="en-swa", version=datasets.Version("1.0.0"), |
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description="Mafand English-Swahili dataset"), |
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MafandConfig(name="en-tsn", version=datasets.Version("1.0.0"), |
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description="Mafand English-Setswana dataset"), |
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MafandConfig(name="en-twi", version=datasets.Version("1.0.0"), |
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description="Mafand English-Twi dataset"), |
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MafandConfig(name="en-xho", version=datasets.Version("1.0.0"), |
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description="Mafand English-Xhosa dataset"), |
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MafandConfig(name="en-yor", version=datasets.Version("1.0.0"), |
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description="Mafand English-Yoruba dataset"), |
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MafandConfig(name="en-zul", version=datasets.Version("1.0.0"), |
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description="Mafand English-Zulu dataset"), |
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MafandConfig(name="fr-bam", version=datasets.Version("1.0.0"), |
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description="Mafand French-Bambara dataset"), |
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MafandConfig(name="fr-bbj", version=datasets.Version("1.0.0"), |
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description="Mafand French-Ghomala dataset"), |
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MafandConfig(name="fr-ewe", version=datasets.Version("1.0.0"), |
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description="Mafand French-Ewe dataset"), |
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MafandConfig(name="fr-fon", version=datasets.Version("1.0.0"), |
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description="Mafand French-Fon dataset"), |
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MafandConfig(name="fr-mos", version=datasets.Version("1.0.0"), |
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description="Mafand French-Mossi dataset"), |
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MafandConfig(name="fr-wol", version=datasets.Version("1.0.0"), |
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description="Mafand French-Wolof dataset"), |
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] |
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def _info(self): |
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source, target = self.config.name.split('-') |
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return datasets.DatasetInfo( |
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description=_DESCRIPTION, |
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features=datasets.Features({"translation": datasets.features.Translation(languages=(source, target))}), |
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supervised_keys=(source, target), |
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homepage="https://github.com/masakhane-io/lafand-mt", |
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citation=_CITATION, |
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) |
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def _split_generators(self, dl_manager): |
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"""Returns SplitGenerators.""" |
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source, target = self.config.name.split('-') |
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if target in ['amh', 'kin', 'nya', 'sna', 'xho']: |
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urls_to_download = { |
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"dev": f"{_URL}{self.config.name}/{_DEV_FILE}", |
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"test": f"{_URL}{self.config.name}/{_TEST_FILE}", |
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} |
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downloaded_files = dl_manager.download_and_extract(urls_to_download) |
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return [ |
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datasets.SplitGenerator(name=datasets.Split.VALIDATION, |
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gen_kwargs={"filepath": downloaded_files["dev"]}), |
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datasets.SplitGenerator(name=datasets.Split.TEST, |
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gen_kwargs={"filepath": downloaded_files["test"]}), |
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] |
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else: |
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urls_to_download = { |
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"train": f"{_URL}{self.config.name}/{_TRAINING_FILE}", |
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"dev": f"{_URL}{self.config.name}/{_DEV_FILE}", |
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"test": f"{_URL}{self.config.name}/{_TEST_FILE}", |
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} |
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downloaded_files = dl_manager.download_and_extract(urls_to_download) |
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return [ |
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datasets.SplitGenerator(name=datasets.Split.TRAIN, |
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gen_kwargs={"filepath": downloaded_files["train"]}), |
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datasets.SplitGenerator(name=datasets.Split.VALIDATION, |
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gen_kwargs={"filepath": downloaded_files["dev"]}), |
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datasets.SplitGenerator(name=datasets.Split.TEST, |
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gen_kwargs={"filepath": downloaded_files["test"]}), |
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] |
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def _generate_examples(self, filepath): |
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logger.info("⏳ Generating examples from = %s", filepath) |
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with open(filepath, encoding="utf-8") as f: |
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idx = 0 |
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for line in f: |
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src_tgt = json.loads(line) |
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yield idx, src_tgt |
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idx += 1 |
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