Calais API - Comments

From their site: Reuters run a service called Calais. The Calais web service automatically attaches rich semantic metadata to the content you submit in well under a second. Using natural language processing, machine learning and other methods, Calais categorizes and links your document with entities (people, places, organizations, etc.), facts (person "x" works for company "y"), and events (person "z" was appointed chairman of company "y" on date "x").