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: In weather terms, the boundary between two air masses is called front. Question: In weather terms, what do you call the boundary between two air masses?
front

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: Dinosaurs filled the niches that mammals fill today during the mesozoic era. Question: Dinosaurs filled the niches that mammals fill today during which era?

mesozoic