Who are the five best basketball players in the history of the Boston Celtics?
1. Bill Russell
2. Larry Bird
3. Bob Cousy
4. Tommy Heinsohn
5. Paul Pierce
<START_INST>Who are the five best basketball players in the history of the Boston Celtics?<END_INST><START_CTX><END_CTX><START_A>1. Bill Russell
2. Larry Bird
3. Bob Cousy
4. Tommy Heinsohn
5. Paul Pierce<END_A>