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\*.

everybody wants to rule the world what is the song about
everybody wanting power

who was crowned emperor of the west in 800 ce
Charlemagne

when did doctor who come back in 2005

26 March