XLTime: A Cross-Lingual Knowledge Transfer Framework for Temporal Expression Extraction

• URL: http://arxiv.org/abs/2205.01757v1
• Date: Tue, 3 May 2022 20:00:42 GMT
• Title: XLTime: A Cross-Lingual Knowledge Transfer Framework for Temporal Expression Extraction
• Authors: Yuwei Cao, William Groves, Tanay Kumar Saha, Joel R. Tetreault, Alex Jaimes, Hao Peng, and Philip S. Yu
• Abstract summary: Temporal Expression Extraction (TEE) is essential for understanding time in natural language. To date, work in this area has mostly focused on English as there is a scarcity of labeled data for other languages. We propose XLTime, a novel framework for multilingual TEE.
• Score: 63.39190486298887
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Temporal Expression Extraction (TEE) is essential for understanding time in natural language. It has applications in Natural Language Processing (NLP) tasks such as question answering, information retrieval, and causal inference. To date, work in this area has mostly focused on English as there is a scarcity of labeled data for other languages. We propose XLTime, a novel framework for multilingual TEE. XLTime works on top of pre-trained language models and leverages multi-task learning to prompt cross-language knowledge transfer both from English and within the non-English languages. XLTime alleviates problems caused by a shortage of data in the target language. We apply XLTime with different language models and show that it outperforms the previous automatic SOTA methods on French, Spanish, Portuguese, and Basque, by large margins. XLTime also closes the gap considerably on the handcrafted HeidelTime method.

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