Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: The term amines is used to describe molecules that contain carbon-nitrogen bonds.

Answer: What term is used to describe molecules that contain carbon-nitrogen bonds?

Question: Pressure and vibration are examples of physical type of stimuli.

Answer: Pressure and vibration are examples of what type of stimuli?

Question: Medium is the matter through which sound waves travel.

Answer:
What is the matter through which sound waves travel?