Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.
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Question: Sentence: Under picture - perfect blue skies , the throng assembled around the base of the Lincoln Memorial where Martin Luther King Jr . delivered his iconic " I Have a Dream " speech and listened to speaker after speaker implore them to become active participants , not bystanders , in the quest of racial equality and harmony .<sep>Span: picture - perfect blue skies ,

Answer: why does this matter?

Question: Sentence: Many people smoke after they ' ve eaten .<sep>Span: Many people

Answer: Which people?

Question: Sentence: She is one of many experts who have combed the terrain for clues on the origin of these potentially dangerous holes , which are about a foot in diameter and seem to survive for less than a day before filling in naturally with sand .<sep>Span: potentially dangerous holes ,

Answer:
How are these holes particularly dangerous?