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.

Input: Consider Input: Question: As a polycrystalline material solidifies, grains with irregular shapes form. the interfaces between grains constitute grain what? Answer: boundaries

Output: 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.

Input: Consider Input: Question: When waves of two different frequencies interfere, what phenomenon occurs? Answer: beating

Output: When waves of two different frequencies interfere, a phenomenon known as beating occurs. The frequency of a beat is the difference of the two frequencies.

Input: Consider Input: Question: How do reptiles typically reproduce? Answer: sexually
Output: Reptiles typically reproduce sexually and lay eggs.