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Sentiment Analysis aims to determine the overall sentiment orientation of a given input text. One motivation for research in this area is the need for consumer related industries to extract public opinion from online portals such as blogs, discussion boards, and reviews. Estimating sentiment orientation in text involves extraction of sentiment rich phrases and the aggregation of their sentiment orientation. Identifying sentiment rich phrases is typically achieved by using manually selecteddoi:10.1007/978-1-84800-094-0_14 dblp:conf/sgai/MukrasWL07 fatcat:2a3bfjsprnfmtky2jf7u5x47km