Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[Q]: Which chemical element is named after the Latin for Copenhagen where it was discovered?
[A]: copenhagen


[Q]: In which film of 1995 did Robert De Niro and Al Pacino appear on screen together for the first time?
[A]: al pacino


[Q]: Who composed the music and lyrics for the stage musical of Billy Elliot?
[A]:
billy elliot the musical