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

Let me give you an example: Sentence: The Obama administration is developing additional screening protocols for airline passengers both overseas and in the United States to control infectious diseases such as Ebola, President Barack Obama said Monday .<sep>Span: Obama administration
The answer to this example can be: What was the duration of the Obama administration?
Here is why: It is an inquisitive question based on the specific span of the sentence.

OK. solve this:
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?