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\*.

[Q]: who was ancient china's main enemy that lived to the north
[A]: Sui Dynasty


[Q]: who has won the most trebles in scottish football
[A]: Celtic


[Q]: how many seasons did fosters home for imaginary friends have
[A]:
6