4. The method of claim 1 , wherein said evaluating comprises: calculating a relative probability that a given token has been generated by a model of interest; calculating a relative probability that the given token has been generated by a model that is not of interest; comparing the calculated relative probabilities; and associating each token with the model that yields the greater relative probability.
4. The method of claim 1 , wherein said evaluating comprises: calculating a relative probability that a given token has been generated by a model of interest; calculating a relative probability that the given token has been generated by a model that is not of interest; comparing the calculated relative probabilities; and associating each token with the model that yields the greater relative probability. 6. The method of claim 4 , wherein a count matrix is used to determine the relative probabilities.