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]: where is britain's got talent semi finals held
[A]: Elstree Studios


[Q]: who led an expedition to explore the louisiana territory
[A]: Lewis and Clark


[Q]: which two countries were the leading powers during the cold war
[A]:
Soviet Union