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.

[Q]: Sentence: No lungs do fish have short esophaguses. Question: Why do fish have short esophaguses?
[A]: no lungs

[Q]: Sentence: Density describes how much matter is in a certain amount of space. Question: What describes how much matter is in a certain amount of space?
[A]: density

[Q]: Sentence: A sudden flow of mud is called a(n) mudflow. Question: What's it called when there's a sudden flow of mud?
[A]:
mudflow