Detailed Instructions: Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.
Problem: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 ,
Solution:
why does this matter?