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\*.

who sang don't go chasing waterfalls first
Marqueze Etheridge

when is the world population expected to reach 8 billion
2024

when did ted hughes wrote the iron man

1968