Given a scientific question, generate a correct answer to it.

Example Input: What is a compound that can form ions when it dissolves in water called?
Example Output: electrolyte

Example Input: In contrast to mammals and birds, freshwater fishes produce large volumes of very dilute what?
Example Output: urine

Example Input: The duodenum, the jejunum, and the ileum are the main regions of which organ?
Example Output:
small intestine