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

[EX Q]: Filter feeders called rotifers collect digestive and excretory wastes in cloacal bladder primitive organ.
[EX A]: Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?

[EX Q]: Radioactive decay can give off energy and particles.
[EX A]: Radioactive decay can give off energy and what else?

[EX Q]: A supervolcano that may have killed all but 10,000 humans resulted in volcanic winter phenomenon, lasting up to a decade.
[EX A]:
A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade?