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

constantine xi palaiologos
Constantine XI Palaiologos was the last ruler of which empire?

church of the savior on blood
The Church of the Savior on Spilled Blood, built on the site of the assassination of Tsar Alexander II, is in which Russian city?

blithe spirit

Which 88 year old Dame is currently appearing in Blithe Spirit in London?