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 did the first civilization in africa start
[A]: Kingdom of Kush


[Q]: when did drinking age go from 18 to 21
[A]: mid-1988


[Q]: who played the joker in the batman tv show
[A]:
Cesar Romero