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.

Sentence: Tissues of marine bony fishes gain excess salts from their surroundings. Question: Tissues of marine bony fishes gain what from their surroundings?
excess salts

Sentence: The parent element are cations simply named after. Question: What are cations simply named after?
the parent element

Sentence: Recrystallization is a process that can remove what, contaminants result when compounds are synthesized. Question: Recrystallization is a process that can remove what, which result when compounds are synthesized?

contaminants