34. The method set forth in claim 33 wherein: in the step of determining the weight of each word, the weight, wt for each word which occurs in the conditional sample is determined by the equation ##EQU12## where .pi. is the conditional probability of the word, a is a value for the frequency of the word in the conditional sample, and E is the expectation of .pi. given a.
34. The method set forth in claim 33 wherein: in the step of determining the weight of each word, the weight, wt for each word which occurs in the conditional sample is determined by the equation ##EQU12## where .pi. is the conditional probability of the word, a is a value for the frequency of the word in the conditional sample, and E is the expectation of .pi. given a. 35. The method set forth in claim 34 wherein: in the step of determining the weight of each word, a is derived by determining for each word from the list which is contained in a context the number of times k the word from the list appears in the corpus and letting all words in the context of such a word contribute a weight of 1/k to a.