TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: What are the most numerous and diverse biochemical compounds? Answer: proteins

SOLUTION: Proteins are the most numerous and diverse biochemical compounds.

PROBLEM: Question: Which planet is closest to the sun? Answer: mercury

SOLUTION: Mercury is closest to the sun.

PROBLEM: Question: A crater can usually be found on the top of what kind of volcanoes? Answer: composite

SOLUTION:
A crater can usually be found on the top of composite volcanoes.