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.

Input: Consider Input: Sentence: Deep currents are caused by differences in density at the top and bottom of the ocean. Question: What is caused by differences in density at the top and bottom of the ocean?

Output: deep currents


Input: Consider Input: Sentence: When scientists work in natural settings rather than a lab, it is called fieldwork. Question: When scientists work in natural settings rather than a lab, it is called what?

Output: fieldwork


Input: Consider Input: Sentence: Transforming from a caterpillar to a butterfly requires a lot of energy. Question: Transforming from a caterpillar to a butterfly requires a lot of what?


Output: energy