Conversation so far:
Where are The Roots from?
The Roots are from Philadelphia, Pennsylvania, United States.
Who started The Roots?
Tariq Black Thought Trotter and Ahmir Questlove Thompson started The Roots.
Where did Tariq Black Thought Trotter and Ahmir Questlove Thompson meet?
Tariq Black Thought Trotter and Ahmir Questlove Thompson were both attending the Philadelphia High School for the Creative and Performing Arts.

Question: What did they do
Self-contained rewrite: What did Tariq Black Thought Trotter and Ahmir Questlove Thompson do during high school after meeting?