Conversation so far:
what is the i have a dream speech about
I Have a Dream is a speech by Martin Luther King Jr. in which he called for civil and economic rights and an end to racism in the United States.
when was the i have a dream speech delivered
I Have a Dream is a speech delivered by American civil rights activist Martin Luther King Jr. during the March on Washington for Jobs and Freedom on August 28, 1963.

Question: what speech did martin luther king jr reference
Self-contained rewrite: what speech did martin luther king jr reference in his i have a dream speech