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

Ex Input:
Volvox sphere has a distinct front and back end.

Ex Output:
What has a distinct front and back end?


Ex Input:
Hemodialysis has a patient’s blood pass through a length of tubing that travels through an artificial kidney machine.

Ex Output:
Which form of dialysis has a patient’s blood pass through a length of tubing that travels through an artificial kidney machine?


Ex Input:
Each lymph organ has a different job in the immune system.

Ex Output:

Each lymph organ has a different job in what system?