Acquiring translation equivalences of multiword expressions by normalized correlation frequencies

Authors:
Ming-Hong Bai;Jia-Ming You;Keh-Jiann Chen;Jason S. Chang
Affiliations:
Academia Sinica, Taiwan and National Tsing-Hua University, Taiwan;Academia Sinica, Taiwan;Academia Sinica, Taiwan;National Tsing-Hua University, Taiwan
Venue:
EMNLP '09 Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing: Volume 2 - Volume 2
Year:
2009

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Abstract

In this paper, we present an algorithm for extracting translations of any given multiword expression from parallel corpora. Given a multiword expression to be translated, the method involves extracting a short list of target candidate words from parallel corpora based on scores of normalized frequency, generating possible translations and filtering out common subsequences, and selecting the top-n possible translations using the Dice coefficient. Experiments show that our approach outperforms the word alignment-based and other naive association-based methods. We also demonstrate that adopting the extracted translations can significantly improve the performance of the Moses machine translation system.