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: Precipitation are a natural process that allows water to return again to the earth’s surface. Question: What natural process allows water to return again to the earth’s surface?
answer:
precipitation


question:
Sentence: Oxygen has increased in the atmosphere throughout the history of the earth. Question: What has increased in the atmosphere throughout the history of the earth?
answer:
oxygen


question:
Sentence: Overharvesting is a serious threat particularly to aquatic species. Question: Overharvesting is a serious threat particularly to which species?
answer:

aquatic species