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.
What did they do?
They would busk out on the street corners with Questlove playing bucket drums and Tariq rapping over his rhythms.
What was there first gig?
Their first organized gig was a talent show.
What was the year?
1989.
What was their name?
Radio Activity.

Question: Why did they chage?
Self-contained rewrite: Why did The Roots change?