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Sentiment Analysis and Subjectivity

1 Sentiment Analysis and Subjectivity Bing Liu Department of Computer Science University of Illinois at Chicago Textual information in the world can be broadly categorized into two main types: facts and opinions. Facts are objective expressions about entities, events and their properties. Opinions are usually subjective expressions that describe people s sentiments, appraisals or feelings toward entities, events and their properties. The concept of opinion is very broad. In this chapter, we only focus on opinion expressions that convey people s positive or negative sentiments.

Sentiment analysis, also known as opinion mining, grows out of this need. It is a challenging natural language processing or text mining problem. Due to its tremendous value for practical applications, there has been an explosive growth of both research in …

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  Analysis, Texts, Mining, Text mining

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