Paper: DLIREC: Aspect Term Extraction and Term Polarity Classification System

ACL ID S14-2038
Title DLIREC: Aspect Term Extraction and Term Polarity Classification System
Venue Joint Conference on Lexical and Computational Semantics
Session
Year 2014
Authors

This paper describes our system used in the Aspect Based Sentiment Analysis Task 4 at the SemEval-2014. Our system con- sists of two components to address two of the subtasks respectively: a Conditional Random Field (CRF) based classifier for Aspect Term Extraction (ATE) and a linear classifier for Aspect Term Polarity Classi- fication (ATP). For the ATE subtask, we implement a variety of lexicon, syntac- tic and semantic features, as well as clus- ter features induced from unlabeled data. Our system achieves state-of-the-art per- formances in ATE, ranking 1st (among 28 submissions) and 2rd (among 27 submis- sions) for the restaurant and laptop domain respectively.