<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Thumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews"^^ . "This paper presents a simple unsupervised learning algorithm for classifying reviews as recommended (thumbs up) or not recommended (thumbs down). The classification of a review is predicted by the average semantic orientation of the phrases in the review that contain adjectives or adverbs. A phrase has a positive semantic orientation when it has good associations (e.g., \"subtle nuances\") and a negative semantic orientation when it has bad associations (e.g., \"very cavalier\"). In this paper, the semantic orientation of a phrase is calculated as the mutual information between the given phrase and the word \"excellent\" minus the mutual information between the given phrase and the word \"poor\". A review is classified as recommended if the average semantic orientation of its phrases is positive. The algorithm achieves an average accuracy of 74% when evaluated on 410 reviews from Epinions, sampled from four different domains (reviews of automobiles, banks, movies, and travel destinations). The accuracy ranges from 84% for automobile reviews to 66% for movie reviews. \n\n"^^ . "2002" . . . . . . . . . "Peter D."^^ . "Turney"^^ . "Peter D. Turney"^^ . . . . . . "Thumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews (Postscript)"^^ . . . . . . "turney-acl02-final.ps"^^ . . . "Thumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews (Image (PNG))"^^ . . . . . . "preview.png"^^ . . . "Thumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews (PDF)"^^ . . . . . . . . . "turney-acl02-final.pdf"^^ . . . "Thumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #2321 \n\nThumbs up or thumbs down? Semantic orientation applied to unsupervised classification of reviews\n\n" . "text/html" . . . "Artificial Intelligence" . . . "Language" . . . "Machine Learning" . . . "Statistical Models" . .