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: Brass alloy is made from copper and zinc. Question: What alloy is made from copper and zinc?
brass

Sentence: The potential of galvanic cell can be used to measure the ph of a solution. Question: The potential of what can be used to measure the ph of a solution?
galvanic cell

Sentence: Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called mouth brooding. Question: Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called what?

mouth brooding