instruction:
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\*.
question:
who was ancient china's main enemy that lived to the north
answer:
Sui Dynasty


question:
how many seasons of eric and jessie are there
answer:
third season


question:
where will the summer games be held in 2012
answer:

London