Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.

Output: What is the term for the skeletal structure of the head that supports the face and protects the brain?


Input: Consider Input: Carried through body happens if cancer cells enter the blood stream.

Output: What happens if cancer cells enter the blood stream?


Input: Consider Input: The head of the sperm contains the nucleus.


Output: What part of the sperm contains the nucleus?