Given a statement, generate a question such that the answer is contained in that statement.

Ex Input:
Nests are used for shelter

Ex Output:
What is used for shelter?


Ex Input:
some therapsids became more mammal-like as they continued to evolve

Ex Output:
How did some therapsids become?


Ex Input:
Humans are the dominant land mammals.

Ex Output:

What are the dominant land mammals?