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.

In what movie did the song white christmas make its debut?
Holiday Inn

Who is the best selling novelist of all time?
Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE

Who sang for lauren bacall in to have and have not?

Howard Andrew Williams