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

Ex Input:
Ionic compounds contain cations and anions rather than discrete neutral molecules.

Ex Output:
Ionic compounds contain cations and anions rather than what?


Ex Input:
Chemical digestion mainly occurs in the small intestine.

Ex Output:
Where does chemical digestion mainly occur?


Ex Input:
Interstitial fluid are all hormones secreted into before entering the circulatory system.

Ex Output:
Where are all hormones secreted into before entering the circulatory system?