6. The method of claim 1 , wherein an importance measure is determined for the one or more terms in the first chronological segment, wherein the one or more terms are selected based on the importance measure.
7. The method of claim 6 , wherein the importance measure is determined based on the grammatical attribute associated with the term, wherein the grammatical attribute includes at least a subject, a predicate or part of a predicate, a head of a multi-word phrase, a modifier in a multi-word phrase, or a sub-phrase of a multi-word phrase.