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

Example Input: 10 million years long can a large star be on the main sequence stage.
Example Output: How long can a large star be on the main sequence stage?

Example Input: Stringed instruments can help show the relationship between tension and frequencies in strings.
Example Output: Stringed instruments can help show the relationship between tension and what in strings?

Example Input: A single-celled prokaryotic is a bacteria.
Example Output:
What type of organism is a bacteria?