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.

Example Input: 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?
Example Output: galvanic cell

Example Input: Sentence: Is the heat of reaction for an endothermic reaction is positive. Question: Is the heat of reaction positive or negative for an endothermic reaction?
Example Output: positive

Example Input: Sentence: Grounding is when you touch a charged object to the earth. Question: What is it called when you touch a charged object to the earth?
Example Output:
grounding