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

Ex Input:
Neutrophils provide an early, rapid, and nonspecific defense against invading pathogens.

Ex Output:
What provides an early, rapid, and nonspecific defense against invading pathogens?


Ex Input:
Certain air pollutants form acid liquid when dissolved in water droplets in the air.

Ex Output:
Certain air pollutants form which liquid when dissolved in water droplets in the air?


Ex Input:
The cells of the blastocyst form an inner cell mass called the embryoblast.

Ex Output:
The cells of the blastocyst form an inner cell mass called the what?