In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Q: Sentence: Minerals form when they precipitate from hot fluids that have done cooled down. Question: Minerals form when they precipitate from hot fluids that have done what?

A: cooled down
****
Q: Sentence: Particles of sand and rock are carried by longshore drift. Question: Particles of sand and what other substance are carried by longshore drift?

A: rock
****
Q: Sentence: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of equilibrium exist. Question: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of what exist?

A:
equilibrium
****