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]: when was it discovered that lead was poisonous
[EX A]: at least 2000 BC

[EX Q]: what is the second biggest state in united states
[EX A]: Texas

[EX Q]: what type of train is thomas the tank engine
[EX A]:
a fictional steam locomotive