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: the circulatory system carries oxygen from the digestive and respiratory systems to the rest of the body
[A]: the circulatory system carries oxygen from the digestive and respiratory systems to the rest of the what?


[Q]: Fact: an incandescent light bulb converts electricity into light by sending electricity through a filament
[A]: Tungsten is a metal which is found in large amounts in filaments, which are used in incandescent light bulbs. These light bulbs work because?


[Q]: Fact: an exothermic reaction increases the amount of heat
[A]:
A person puts a potato in some embers on the edge of a campfire and the potato gets hot. The embers are?


