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

Input: Consider Input: caffeine is an addictive substance

Output: What is an addictive substance?

Input: Consider Input: The volume of an object can be used to measure that object.

Output: What can be used to measure an object?

Input: Consider Input: lGrasshoppers can spread disease and destroy crops
Output: Who can spread disease and destroy crops?