18. A computer-readable storage medium containing instructions for classifying sentences, by a method comprising: providing a sentence classifier to classify sentences based on feature representations of the sentences and classifications of the sentences, the classifier being trained using training data; receiving a sentence; generating a feature representation of the sentence; and applying the provided sentence classifier to the generated feature representation of the sentence to classify the sentence wherein the feature representations include a pattern feature and wherein the pattern feature is based on support of a generalized sentence of a sentence to be a generalized sentence pattern of sentences within training data.
18. A computer-readable storage medium containing instructions for classifying sentences, by a method comprising: providing a sentence classifier to classify sentences based on feature representations of the sentences and classifications of the sentences, the classifier being trained using training data; receiving a sentence; generating a feature representation of the sentence; and applying the provided sentence classifier to the generated feature representation of the sentence to classify the sentence wherein the feature representations include a pattern feature and wherein the pattern feature is based on support of a generalized sentence of a sentence to be a generalized sentence pattern of sentences within training data. 22. The computer-readable storage medium of claim 18 wherein the support is based on a generalized sentence being a subset of other generalized sentences of sentences in training data.