You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

Category: LESSER-KNOWN AMERICANS 
Clue: A. Philip Randolph, who first proposed a march on this city in 1941, also helped organize the one in 1963
washington, d.c.

Category: SONGS OF THE '60S 
Clue: Louis Armstrong's only No. 1 hit, it hit the charts for 19 weeks in 1964
"hello, dolly!"

Category: YOU CAN QUOTE ME 
Clue: This Surrealist once quipped that "The only difference between me and a madman is that I am not mad"

dalí