13. The method of claim 11, wherein the language model is an n-gram language model, and said method further comprises the step of: in a training phase of the n-gram language model, segmenting a corresponding text corpus into paragraphs to obtain word frequency counts that include the subject punctuation mark in a position other than a last position.
15. The method of claim 13, wherein the n-gram language model is one of a bigram language model and a trigram language model.