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.

Q: Sentence: Liquid nitrogen is used for cooling detectors of infrared telescopes. Question: What is used for cooling detectors of infrared telescopes?

A: liquid nitrogen
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Q: Sentence: There are four valves in the heart. Question: How many valves are in the heart?

A: four
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Q: Sentence: In a tropical rainforest, understory are ferns common. Question: In a tropical rainforest, where are ferns common?

A:
understory
****
