9. A computing device that generates opinion data, the computing device comprising: a training data store containing training data that includes sentences and associated indications of opinions expressed by each sentence; an identify sequences component that identifies from the training data sequences of parts of speech that may express an opinion; a first calculate probability component that calculates from the training data a probability that each sequence contains a word that may express an opinion; a second calculate probability component that calculates from the training data a probability that each word expresses an opinion; and an opinion data store that specifies sequences of parts of speech that may express an opinion, a probability that each sequence contains a word that may express an opinion, and a probability that each word expresses an opinion.
9. A computing device that generates opinion data, the computing device comprising: a training data store containing training data that includes sentences and associated indications of opinions expressed by each sentence; an identify sequences component that identifies from the training data sequences of parts of speech that may express an opinion; a first calculate probability component that calculates from the training data a probability that each sequence contains a word that may express an opinion; a second calculate probability component that calculates from the training data a probability that each word expresses an opinion; and an opinion data store that specifies sequences of parts of speech that may express an opinion, a probability that each sequence contains a word that may express an opinion, and a probability that each word expresses an opinion. 11. The computing device of claim 9 wherein the first calculate probability component calculates the probability as follows: P ⁡ ( o ⁢ ⁢ w ❘ s ⁢ ⁢ p ) = C o ⁢ ⁢ w ❘ s ⁢ ⁢ p C s ⁢ ⁢ p where P(ow|sp) represents the conditional probability of a sentence containing an opinion word ow given a sequence of parts of speech sp of the sentence, C ow|sp represents the count of sentences with the sequence of parts of speech sp that contains opinion word ow, and C sp is a count of sentences that match the sequence of parts of speech sp.