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SoMeWeTa: A Part-of-Speech Tagger for German Social Media and Web Texts
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SoMeWeTa: A Part-of-Speech Tagger for German Social Media and Web Texts
Off-the-shelf part-of-speech taggers typically perform relatively poorly on web and social media texts since those domains are quite different from the newspaper articles on which most tagger models are trained. In this paper, we describe SoMeWeTa, a part-of-speech tagger based on the averaged structured perceptron that is capable of domain adaptation and that can use various external resources. We train the tagger on the German web and social media data of the EmpiriST 2015 shared task. Using the TIGER corpus as background data and adding external information about word classes and Brown clusters, we substantially improve on the state of the art for both the web and the social media data sets. The tagger is available as free software.
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