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]: who sings the hell song in the south park movie
[A]: Metallica lead singer James Hetfield


[Q]: who discovered the subatomic particles of an atom
[A]: James Chadwick


[Q]: where does the blastocyst implanted in the female human reproductive system
[A]:
the wall of the uterus