Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.

Example Input: Sentence: Next spring , spinning wheels will hum again in Lancaster County , South Carolina .<sep>Span: again
Example Output: Why did the spinning wheels stop humming?

Example Input: Sentence: An Internet video of six young Iranian men and women dancing to Pharrell Williams ' " Happy " has led to their arrests , showing how far Tehran will go to halt what it deems to be decadent Western behavior - despite the views of its moderate president .<sep>Span: " Happy "
Example Output: Is that a popular song?

Example Input: Sentence: A number of plants and animals threatened by souring seas , including some mussels , abalone , rock oysters , plankton and even a few fish , appear likely — at least at first — to adjust or evolve .<sep>Span: souring seas ,
Example Output:
What is a souring sea?

