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Faceted Wikipedia Search allows users to ask complex queries against Wikipedia. The answers to these queries are not generated using key word matching as the answers of search engines like Google or Yahoo, but are generated based on structured information that has been extracted from many different Wikipedia articles.

Natural language search engine - QA system developed by HON (The HONcode is the most widely accepted reference for online health and medical publishers.)

Our technology is built upon the foundation of advanced Natural Language Processing technology.  Lexxe handles the query differently depending on whether it is a question or a keyword search. So Lexxe's first task is to decide whether the query is a question. Lexxe displays three kinds of results - "answers", "clusters" and "web page snippets".

Powerset provides different kinds of results depending on whether you are searching based on a broad topic, a simple question, or more complex questions and phrases. While we do not claim to be able to directly answer all of your questions, we will help you find documents related to your query if they exist in Wikipedia and Freebase.

Ask questions via twitter! Message any question to @answers