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: Diffusion is the process in which a substance naturally moves from an area of higher to lower concentration. Question: What is the process in which a substance naturally moves from an area of higher to lower concentration called?
answer:
diffusion


question:
Sentence: Tropic and sex two types of hormones regulate mammalian reproduction. Question: What two types of hormones regulate mammalian reproduction?
answer:
tropic and sex


question:
Sentence: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs called. Question: What are a class of tetrapod vertebrates that produce amniotic eggs called?
answer:

reptiles