Conversation so far:
Where are The Roots from?
Philadelphia.
Who started it?
Ahmir "Questlove" Thompson and Tariq "Black Thought" Trotter.
Where did these two meet?
Philadelphia High School for the Creative and Performing Arts.

Question: What did they do?
Self-contained rewrite: What did Amir "Questlove" Thompson and Tariq "Black Thought" Trotter" do?