Given an open-ended topic (movie name, a persons name, an event, sports, etc) generate a simple trivia-type question.

alexander
Who in the 2005 film Alexander played Alexander the Great?

battle of falkirk
Who was defeated at the Battle of Falkirk in 1298 and later captured and executed in 1305?

david mccallum
Joanna Lumley and David McCallum played which pair in a TV series?