Given a statement, generate a question such that the answer is contained in that statement.

Example Input: Butterflies have two pairs of wings for flight.
Example Output: How many pairs of wings do Butterflies have?

Example Input: Fly larvae enter the host through epithelial tissue
Example Output: What enters the host through epithelial tissue?

Example Input: The release of an egg during ovulation is used in mating.
Example Output:
The release of an egg during ovulation is used in what?