15. The method of claim 11 , further comprising determining to perform the additional inquiry, wherein the additional query comprises statistically analyzing phrases within the set of documents, and identifying a plurality of statistically interesting phrases based on the statistical analysis, the statistically interesting phrases having a statistical property that distinguishes them from other phrases in the documents.
15. The method of claim 11 , further comprising determining to perform the additional inquiry, wherein the additional query comprises statistically analyzing phrases within the set of documents, and identifying a plurality of statistically interesting phrases based on the statistical analysis, the statistically interesting phrases having a statistical property that distinguishes them from other phrases in the documents. 16. The method of claim 15 , wherein identifying the plurality of statistically interesting phrases comprises one of selecting phrases having a frequency of occurrence that exceeds a predetermined threshold, and selecting a pre-determined number of phrases having a frequency of occurrence higher than a frequency of occurrence of other phrases in the documents.