In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

[EX Q]: where was the first motte and bailey castle built
[EX A]: northern Europe

[EX Q]: who plays jem in to kill a mockingbird
[EX A]: Phillip Alford

[EX Q]: who played george in back to the future
[EX A]:
Glover