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

Ex Input:
Humans have 23 pairs pairs of chromosomes.

Ex Output:
How many pairs of chromosomes do human have ?


Ex Input:
Superior sagittal sinus is the largest of the sinuses.

Ex Output:
What is the largest of the sinuses?


Ex Input:
Chordates include vertebrates and invertebrates that have a notochord.

Ex Output:

Chordates include vertebrates and invertebrates that have what?