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

Ex Input:
Most ferns produce the same type of spores and are therefore called homosporous.

Ex Output:
Most ferns produce the same type of spores and are therefore called what?

Ex Input:
Yeast fermentation causes holes in bread.

Ex Output:
What causes holes in bread?

Ex Input:
A drumlin is the name of a long and low hill of sediments which have been deposited by a glacier.

Ex Output:
What is the name of a long and low hill of sediments which have been deposited by a glacier?