It's hard. Natural language processing and semantic analysis is a fairly deep field of knowledge. One evidence of its complexity is PowerSet itself. PowerSet

It's hard. Natural language processing and semantic analysis is a fairly deep field of knowledge. One evidence of its complexity is PowerSet itself. PowerSet launched with just being able to search Wikipedia. Wikipedia is a highly, highly structured body of text that is much, much easier for NLP and semantic technology to analyze. Taking the same technology to the garbled soup that is the web is a whole different ballgame.