... sentence -based ap-proach based on a new information representa-tion, namely topic-sentiment word pair, to cap-ture intra-sentence contextual information be-tween an opinion and its target. Additionally, ... including sentiment classifica-tion, opinion extraction, opinion question ans-wering, and opinion summarization, etc. are re-ceiving growing attention (Wilson, et al., 2005; Liu et al., 2005; ... document -based opinion retrieval model was adopted. The model used sentiment lexicon -based method for opinion identification and a conventional information retrieval method for relevance detection. (3)...