Teaching a New Dog Old Tricks: Resurrecting Multilingual Retrieval Using Zero-shot Learning

• URL: http://arxiv.org/abs/1912.13080v1
• Date: Mon, 30 Dec 2019 20:46:38 GMT
• Title: Teaching a New Dog Old Tricks: Resurrecting Multilingual Retrieval Using Zero-shot Learning
• Authors: Sean MacAvaney, Luca Soldaini, Nazli Goharian
• Abstract summary: We tackle the lack of data by leveraging pre-trained multilingual language models to transfer a retrieval system trained on English collections to non-English queries and documents. Our results show that the proposed approach can significantly outperform unsupervised retrieval techniques for Arabic, Chinese Mandarin, and Spanish.
• Score: 30.868309879441615
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: While billions of non-English speaking users rely on search engines every day, the problem of ad-hoc information retrieval is rarely studied for non-English languages. This is primarily due to a lack of data set that are suitable to train ranking algorithms. In this paper, we tackle the lack of data by leveraging pre-trained multilingual language models to transfer a retrieval system trained on English collections to non-English queries and documents. Our model is evaluated in a zero-shot setting, meaning that we use them to predict relevance scores for query-document pairs in languages never seen during training. Our results show that the proposed approach can significantly outperform unsupervised retrieval techniques for Arabic, Chinese Mandarin, and Spanish. We also show that augmenting the English training collection with some examples from the target language can sometimes improve performance.

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