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 holds the world record for the women's marathon
Paula Jane Radcliffe, MBE

malware that essentially is a form of social engineering
Trojan horses

when did the united states get involved in world war ii

December 1941