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: Property to time kind of variation does a rate measure. Question: What kind of variation does a rate measure?
answer:
property to time


question:
Sentence: Mars is the fourth planet from the sun. Question: Which is the fourth planet from the sun?
answer:
mars


question:
Sentence: Negative growth rate results when birth rates fall even lower than death rates. Question: What results when birth rates fall even lower than death rates?
answer:

negative growth rate