26. The computer program product of claim 23 , wherein the lexicon module is further configured to: identify n-grams occurring within the documents in the set of high-sentiment documents; filter the identified n-grams to remove n-grams unlikely to express sentiment in the specific domain; and store the filtered n-grams as the domain-specific sentiment lexicon.
26. The computer program product of claim 23 , wherein the lexicon module is further configured to: identify n-grams occurring within the documents in the set of high-sentiment documents; filter the identified n-grams to remove n-grams unlikely to express sentiment in the specific domain; and store the filtered n-grams as the domain-specific sentiment lexicon. 27. The computer program product of claim 26 , wherein filtering the identified n-grams comprises: removing extremely common n-grams.