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

Example Input: Gastric emptying is regulated by both the stomach and the duodenum.
Example Output: Gastric emptying is regulated by both the stomach and what other digestive structure?

Example Input: Destructive interference in waves occurs two troughs what things overlap.
Example Output: Destructive interference in waves occurs when what things overlap?

Example Input: As the population grows, competition for food grows.
Example Output:
As the population grows, competition for food does what?