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\*.

[EX Q]: who discovered the magnetic effect of electric current
[EX A]: Hans Christian Ørsted

[EX Q]: how many types of finch species are there
[EX A]: about fifteen

[EX Q]: when did the english start using the longbow
[EX A]:
2665 BC