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.

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?
precipitation

Sentence: Kinetic engergy is the energy of anything in motion. Question: Which type of energy is the energy of anything in motion?
kinetic engergy

Sentence: There are about 50,000 vertebrate species, and they are placed in nine different classes. Question: There are about 50,000 vertebrate species, and they are placed in how many different classes?

nine