13. A computer program product comprising: a computer-readable storage comprising computer-usable program code stored thereon that processes text within a natural language understanding system, the computer-readable storage comprising: computer-usable program code that applies a first tokenization technique to a sentence using a statistical tokenization model; computer-usable program code that applies a second subsequent tokenization technique to the sentence using a named only entity only when the first tokenization technique does not extract a needed token according to a class of the sentence; and computer-usable program code that outputs a token determined according to at least one of the tokenization techniques.
13. A computer program product comprising: a computer-readable storage comprising computer-usable program code stored thereon that processes text within a natural language understanding system, the computer-readable storage comprising: computer-usable program code that applies a first tokenization technique to a sentence using a statistical tokenization model; computer-usable program code that applies a second subsequent tokenization technique to the sentence using a named only entity only when the first tokenization technique does not extract a needed token according to a class of the sentence; and computer-usable program code that outputs a token determined according to at least one of the tokenization techniques. 14. The computer program product of claim 13 , wherein the computer-readable storage further comprises: computer-usable program code that first determines the class for the sentence using a statistical classification model; and computer-usable program code that determines whether tokenization is needed according to the class of the sentence.