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 Input:
when did thanksgiving start as a national holiday

Ex Output:
1789


Ex Input:
who led an expedition to explore the louisiana territory

Ex Output:
Lewis and Clark


Ex Input:
the earliest known form of african art is

Ex Output:

African rock art