Conversation so far:
Who was the original line up?
original lineup included Tariq "Black Thought" Trotter (MC) and Ahmir "Questlove" Thompson (drums.
Where did they meet?
classmates at the Philadelphia High School for Creative and Performing Arts.
Who was added?
Josh "The Rubberband" Abrams.

Question: Where did they find him?
Self-contained rewrite: Where did The Roots find Josh Abrams?