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Multilingual Part-of-Speech Tagging Two Unsupervised Approaches

Author(s)
Naseem, Tahira; Snyder, Benjamin; Eisenstein, Jacob; Barzilay, Regina
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Abstract
We demonstrate the effectiveness of multilingual learning for unsupervised part-of-speech tagging. The central assumption of our work is that by combining cues from multiple languages, the structure of each becomes more apparent. We consider two ways of applying this intuition to the problem of unsupervised part-of-speech tagging: a model that directly merges tag structures for a pair of languages into a single sequence and a second model which instead incorporates multilingual context using latent variables. Both approaches are formulated as hierarchical Bayesian models, using Markov Chain Monte Carlo sampling techniques for inference. Our results demonstrate that by incorporating multilingual evidence we can achieve impressive performance gains across a range of scenarios. We also found that performance improves steadily as the number of available languages increases.
Date issued
2009-11
URI
http://hdl.handle.net/1721.1/62804
Department
Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
Journal of Artificial Intelligence Research
Publisher
AI Access Foundation
Citation
Naseem, Tahira, et al. "Multilingual Part-of-Speech Tagging Two Unsupervised Approaches." Journal of Artificial Intelligence Research 36 (2009) 341-385. © AI Access Foundation.
Version: Final published version
ISSN
1943-5037
1076-9757

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