Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

[Q]: Fact: a hot substance is a source of heat
[A]: Water can be boiled in a pot over a?


[Q]: Fact: a chloroplast contains chlorophyll
[A]: What contains chlorophyll?


[Q]: Fact: lack of food causes starvation
[A]:
A human who goes long periods of time without nourishment will experience?