Only use if no specific subclasses of event:Event are appropriate. This class will also display instances of subclasses under Event, e.g. Philosophy Department Discussion Club; 2009 Racker Lecture; screening of a documentary. In addition to a location in space and time, an event may have any or all the following qualities: actively participating agents, passive factors, work products. Also, it may be in a virtual space or part of a series such as a lecture series. The previous short definition was: "An arbitrary classification of a space/time region, by a cognitive agent." Something that happens at a given place and time.