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]: malware that essentially is a form of social engineering
[A]: Trojan horses


[Q]: who plays jacob black's father in twilight
[A]: Gil Birmingham


[Q]: what developed during the middle ages to organize members with similar interests or professions
[A]:
associations