opinion mining deals with an analysis of user reviews for extracting their opinions, sentiments and demands in a specific area, which can play an important role in making major decisions in such area. in general, opinion mining extracts user reviews at three levels of document, sentence and feature. opinion mining at the feature level is taken into consideration more than the other two levels d...

Action-based dependency parsing, also known as deterministic dependency parsing, has often been regarded as a time efficient parsing algorithm while its parsing accuracy is a little lower than the best results reported by more complex parsing models. In this paper, we compare actionbased dependency parsers with complex parsing methods such as all-pairs parsers on Penn Chinese Treebank. For Chin...

A dependency parser analyzes syntactic structure by identifying dependency relations between words. In this lecture, I will introduce dependency-based syntactic representations (§1), arcfactored models for dependency parsing (§2), and online learning algorithms for such models (§3). I will then discuss two important parsing algorithms for these models: Eisner’s algorithm for projective dependen...