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.

Fact: a lever is used for moving heavy objects. Question: In order for a crane to operate properly it requires?
a fulcrum

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

Fact: adulthood is a stage in the life cycle process. Question: Humans go through multiple stages in their life. First is infancy, last is?

being an adult