4. The method of claim 1 , wherein the lexical pattern has at least one token including identifiers and fields to match with a node and structure of the syntactic tree of the sentence within the document from the first subset of documents.
4. The method of claim 1 , wherein the lexical pattern has at least one token including identifiers and fields to match with a node and structure of the syntactic tree of the sentence within the document from the first subset of documents. 5. The method of claim 4 , wherein each token of the plurality of tokens includes a lemma field to specify text within the set of documents, a polarity field to identify a polarity word within the set of documents, and a parts-of-speech field to specify a grammatical part-of-speech of the text.