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.

[Q]: Fact: a canyon forming occurs over a period of millions of years. Question: How long did it take the Grand Canyon to form? A?
[A]: very lengthy amount of time


[Q]: Fact: rocks often contain large amounts of metal. Question: rocks often contain large amounts of?
[A]: aluminium


[Q]: Fact: as available water decreases , the population of plants will decrease. Question: The population of plants will go down if?
[A]:
there's less liquid around