instruction:
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.
question:
Sentence: The mineral quartz is used to produce glass. Question: What mineral is used to produce glass?
answer:
quartz


question:
Sentence: Period is the time interval required for one complete wave to pass a point called. Question: What is the time interval required for one complete wave to pass a point called?
answer:
period


question:
Sentence: You call elements that contain only atoms of one type of element native elements. Question: What do you call elements that contain only atoms of one type of element?
answer:

native elements