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: A bow wake is created when the wave source moves faster than the wave propagation speed. Question: What is created when the wave source moves faster than the wave propagation speed?
bow wake

Sentence: Most of the heat that enters the mesosphere comes from the stratosphere. Question: Most of the heat that enters the mesosphere comes from where?
the stratosphere

Sentence: In a position-time graph, the slope of the line represents the velocity. Question: In a position-time graph, what does the slope of the line represent?
velocity