14. The apparatus of claim 13 , wherein the processing a first text into a first bag of words comprises processing each of a plurality of first texts into a first bag of words and the second bag of words comprises a plurality of second bags of words and wherein the computing a similarity between the first bag of words and at least one second bag of words comprises computing a similarity between each of the first bags of words and a most similar one of the second bags of words.
15. The apparatus of claim 14 further comprising computing an average of the similarities.