1. Multi-layered semiotic mechanism for answering natural language questions using document retrieval combined with information extraction

    A system and method are provided for processing a document containing multiple words to extract an answer. The method uses a set of signatures and signature based rules. Each rule includes a name formed by concatenating the signatures included in the rule and a concept which is assignable to the combination of signatures included in the rule. The method parses the words and assigns a signature to each of them. It may also assign a window which includes a parameter defining the number of signatures viewable at one time. The window may be moved so that the window reveals signatures ...
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