1. A system comprising: a non-transitory memory storing content information, wherein the content information comprises user response information and product information; and one or more hardware processors in communication with the non-transitory memory and configured to: receive a first content, wherein the first content includes a first sentence having at least one first sentiment expression; create a syntactic parse tree of the first sentence; identify a first sentiment in the at least one first sentiment expression, wherein the first sentiment corresponds to a first polarity; and determine a first needs expression corresponding to the first sentiment, wherein the first needs expression includes a first subject.