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: phloem transports materials through the plant. Question: Phloem?
[EX A]: acts as a delivery person for a plant

[EX Q]: Fact: as the use of a crop increases , the amount of crops planted will increase. Question: When the demand for corn rises?
[EX A]: farmers must harvest more corn

[EX Q]: Fact: weathering usually occurs over a period of many years. Question: A stone is weathered into sand in about?
[EX A]:
a millennia