In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

[Q]: In what movie did the song white christmas make its debut?
[A]: Holiday Inn


[Q]: Who's the best selling artist of all time?
[A]: The Beatles


[Q]: Who played the smoking man in x files?
[A]:
William Bruce Davis