In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
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Question: Sentence: Combustion reactions involve the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide. Question: What involves the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide?

Answer: combustion reactions


Question: Sentence: A(n) well is a hole that is dug or drilled through the ground down to an aquifer. Question: What is hole that is dug or drilled through the ground down to an aquifer?

Answer: well


Question: Sentence: Sea animals are natural sponges made of. Question: What are natural sponges made of?

Answer:
sea animals