21. The method of claim 15 , wherein a noun extraction process is performed in which a part-of-speech (pos) tagger is used to tag lines in the chat based on pos information.
21. The method of claim 15 , wherein a noun extraction process is performed in which a part-of-speech (pos) tagger is used to tag lines in the chat based on pos information. 22. The method of claim 21 , wherein a first noun from the line of chat text is extracted based on the hypothesis that most of the time the product name is mentioned as the first noun.