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\*.

where did the first civilization in africa start
Kingdom of Kush

who stars in the movie i can only imagine
Trace Adkins

who played sara lance in arrow season 2

Caity Lotz