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

Ex Input:
The long bone work as lever.

Ex Output:
What type of function does the long bone perform?


Ex Input:
Destructive interference in waves occurs two troughs what things overlap.

Ex Output:
Destructive interference in waves occurs when what things overlap?


Ex Input:
A phospholipid is a bond between the glycerol component of a lipid and phosphorous molecule else.

Ex Output:

A phospholipid is a bond between the glycerol component of a lipid and what else?