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.

What kind of bbq sauce does burger king use?
Sweet Baby Ray's

Who wrote the song imagine by the beatles?
John Lennon and Yoko Ono

What was the code name for the d day invasion?

Operation Neptune