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.

Ex Input:
Sentence: The acidity of a solution is typically assessed experimentally by measurement of its ph. Question: The acidity of a solution is typically assessed experimentally by measurement of its what?

Ex Output:
ph


Ex Input:
Sentence: They are not transcribed happens to structural genes in the presence of tryptophan. Question: What happens to structural genes in the presence of tryptophan?

Ex Output:
they are not transcribed


Ex Input:
Sentence: A microscope would best help a person observe the parts of a plant cell. Question: Which tool would best help a person observe the parts of a plant cell?

Ex Output:

microscope