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

Input: Consider Input: Pregnancy can happen if protection breaks.

Output: When can pregnancy happen?


Input: Consider Input: Muscles in the upper arm lengthen a person's elbow.

Output: What lengthen a person's elbow?


Input: Consider Input: hornworts occupy niches in wet habitats


Output: What occupy niches in wet habitats?