4. The method of claim 3 , wherein classifying each word in the current sentence against the semantic anchors includes: measuring a closeness between a vector representing the word and the semantic anchors to determine closeness measures; and determining a novelty score from the closeness measures, wherein the novelty score has a first value when the information is new and a second value when the information is previously given.
3. The method of claim 2 , wherein determining the semantic relationship using LSA includes: generating a word prominence assignment model comprising semantic anchors associated with the current sentence and the number of preceding sentences; and classifying each word in the current sentence against the semantic anchors to determine whether the word represents the new or previously given information.