11. A computer-implemented method of semantic classification, the computer-implemented method comprising: receiving, at a computerized training manager, a set of utterances for training a given computerized semantic classifier, the set of utterances being transcribed utterances; semantically labeling utterances from the set of utterances by multiple previously-trained computerized semantic classifiers; identifying, by the computerized training manager, semantically labeled utterances that are semantically similar; grouping, by the computerized training manager, utterances from the semantically labeled utterances into sets of utterances based on a predetermined measure of semantic similarity between pairs of semantically labeled utterances; presenting, by the computerized training manager, a given utterance from the set of utterances along with available semantic labels for manual selection of an available semantic label to classify a given set of semantically grouped utterances; and training, by the computerized training manager, the given computerized semantic classifier using the classified given set of semantically grouped utterances.
11. A computer-implemented method of semantic classification, the computer-implemented method comprising: receiving, at a computerized training manager, a set of utterances for training a given computerized semantic classifier, the set of utterances being transcribed utterances; semantically labeling utterances from the set of utterances by multiple previously-trained computerized semantic classifiers; identifying, by the computerized training manager, semantically labeled utterances that are semantically similar; grouping, by the computerized training manager, utterances from the semantically labeled utterances into sets of utterances based on a predetermined measure of semantic similarity between pairs of semantically labeled utterances; presenting, by the computerized training manager, a given utterance from the set of utterances along with available semantic labels for manual selection of an available semantic label to classify a given set of semantically grouped utterances; and training, by the computerized training manager, the given computerized semantic classifier using the classified given set of semantically grouped utterances. 15. The computer-implemented method of claim 11 , wherein receiving the set of utterances includes receiving, at the computerized training manager, text utterances automatically transcribed by a speech recognizer, the set of utterances being received for use in training a speech recognition call routing application, the given computerized semantic classifier being part of the speech recognition call routing application.