Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[EX Q]: Question: What is the property that determines the amount of current flow through a particular material? Answer: resistance
[EX A]: Resistance is the property that determines the amount of current flow through a particular material.

[EX Q]: Question: As a polycrystalline material solidifies, grains with irregular shapes form. the interfaces between grains constitute grain what? Answer: boundaries
[EX A]: Grain boundaries. As a polycrystalline material solidifies, grains with irregular shapes form. The interfaces between grains constitute grain boundaries. (Squares represent unit cells within grains.

[EX Q]: Question: What is the most common type of cancer in adult males? Answer: prostate
[EX A]:
The most common type of cancer in adult males is cancer of the prostate gland. The prostate gland is part of the male reproductive system. About one third of all cancers in men are prostate cancers.