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 Input:
Fact: stalactites are formed by deposition. Question: The ceiling of the cave grew closer to the ground due to:?

Ex Output:
deposition


Ex Input:
Fact: a plant 's roots slowly break down rocks as the roots grow. Question: A cypress tree's stout roots splitting asphalt is an example of?

Ex Output:
weathering


Ex Input:
Fact: recyclable means a material can be recycled. Question: Recycling which of the following has a positive impact on the environment?

Ex Output:

acquired earth materials