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 long bone work as lever.

Answer: What type of function does the long bone perform?


Question: After fertilization, a zygote forms into two cells.

Answer: After fertilization, how many cells does a zygote form into?


Question: Opposite charges attract one another.

Answer:
What do opposite charges do to one another?