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

[Q]: Protists are thought to be the oldest eukaryotes.
[A]: What is thought to be the oldest eukaryotes?

[Q]: Interstitial fluid are all hormones secreted into before entering the circulatory system.
[A]: Where are all hormones secreted into before entering the circulatory system?

[Q]: Balloon deflates will happen if the gas particles inside an inflated balloon suddenly stop moving.
[A]:
What will happen if the gas particles inside an inflated balloon suddenly stop moving?