News Comments on the web express readers’ attitudes or opinions about an event or object in the corresponding news article. And opinion target extrac-tion from news comments is very impor-tant for many useful Web applications. However, many sentences in the com-ments are irregular and informal, and sometimes the opinion targets are impli-cit. Thus the task is very challenging and it has not been investigated yet. In this paper, we propose a new approach to un-iformly extracting explicit and implicit opinion targets from news comments by using Centering Theory. The approach uses global information in news articles as well as contextual information in ad-jacent sentences of comments. Our expe-rimental results verify the effectiveness of the proposed approach.
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