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: An example of a chemical change is acid breaking down substances. Question: Drinking cola daily removes layers from the surface of?
[EX A]: enamel on molars

[EX Q]: Fact: cutting down trees in a forest causes the number of trees to decrease in that forest. Question: cutting down trees in a forest causes the number of trees to decrease where?
[EX A]: timberland

[EX Q]: Fact: vaccines can help prevent illness. Question: Before their trip to the Amazon Bill and Jane had sharp metal objects stuck into their arms by a doctor.?
[EX A]:
they wanted to avoid contracting something