In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.

[EX Q]: Fact: a switch is used to stop the flow of current in an electrical circuit. Question: A person wants a room that is artificially brightened to go back to darkness, so they?
[EX A]: adjust a switch

[EX Q]: Fact: large trees block sunlight from reaching the ground. Question: Large trees block sunlight from reaching what?
[EX A]: lower areas

[EX Q]: Fact: an organism is a source of organic material. Question: which of these eventually form crude oil after millions of years in the earth?
[EX A]:
a family of dogs