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.

[EX Q]: Who sang this old house in the 1950s?
[EX A]: Rosemary Clooney

[EX Q]: Who played the first lady in olympus has fallen?
[EX A]: Ashley Judd

[EX Q]: When did the help to buy isa scheme start?
[EX A]:
2015