instruction:
Given a statement, generate a question such that the answer is contained in that statement.
question:
Some snakes can go a long time between meals
answer:
What can go a long time between meals?

question:
Some species of lizards can go several weeks without eating.
answer:
How long can some lizards go without eating?

question:
A sifter can be used for separating flours.
answer:
What can a sifter be used for?