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: Line graphs are especially useful for showing changes over time.

Answer: Line graphs are especially useful for showing changes over what?


Question: Induced or spontaneous are the two methods in which mutations arise in dna.

Answer: What are the two methods in which mutations arise in dna?


Question: Trichomoniasis is cause by a protozoa.

Answer:
Trichomoniasis is cause by what type of pathogen?