TASK DEFINITION: An answer is given. Generate a question for which the given answer is either a direct or partial answer.
PROBLEM: Answer: detroit pistons

SOLUTION: what nba team won back to back in 1989 and 1990?

PROBLEM: Answer: stevie wonder

SOLUTION: who did the jonas brother sing with at the grammys?

PROBLEM: Answer: nashville, tennessee

SOLUTION:
what are the three biggest cities in tennessee?