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

Input: Consider Input: Radioactive decay can give off energy and particles.

Output: Radioactive decay can give off energy and what else?

Input: Consider Input: Filter feeders called rotifers collect digestive and excretory wastes in cloacal bladder primitive organ.

Output: Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?

Input: Consider Input: Two many more legs do spiders have compared to insects.
Output: How many more legs do spiders have compared to insects?