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

Example Input: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.
Example Output: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?

Example Input: Three many families are known quarks divided into.
Example Output: How many families are known quarks divided into?

Example Input: Four many bases does dna have in total.
Example Output:
How many bases does dna have in total?