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

Ex Input:
The term amines is used to describe molecules that contain carbon-nitrogen bonds.

Ex Output:
What term is used to describe molecules that contain carbon-nitrogen bonds?


Ex Input:
Solid form do alkali metals take at room temperature.

Ex Output:
What form do alkali metals take at room temperature?


Ex Input:
There are six types types of simple machines.

Ex Output:

How many types of simple machines are there?