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

Example Input: All cells have the small size in common.
Example Output: What do all cells have in common?

Example Input: Phototaxis is the term for movement toward light.
Example Output: What is the term for movement toward light?

Example Input: The largest known proteins are called titins.
Example Output:
What are the largest known proteins called?