Is there a meta searching web engine that can answer questions?

Metadata helps to bridge the semantic gap. By telling a computer how data are related and how these relations can be evaluated automatically it shall be possible to process even more complex filter and search operations. For example, if a search engine understands that "Van Gogh" was a "Dutch painter", it can answer a search query on "Dutch painters" with a link to a web page about Vincent Van Gogh, although the exact term "Dutch painters" never occurs on that site; today, this is not possible. This approach is also called knowledge representation. It is of special interest to the semantic web and artificial intelligence.