PowerSet is a new search tool that uses the semantics of natural language, in other words it is a search based on semantics. In order to demonstrate the concept and highlight the service currently a search can be applied only to Wikipedia articles.
My few experiments resulted in finding relevant information in the right context. You can use search terms, ask a question or type in part of a sentence and offers some elegant options. (There is also a video demo and a PowerSet Blog ) I guess it is one more step forward for the Semantic web because if search takes this type of turn clear content organization is going to be very important.
