Question: The 76ers–Celtics rivalry is a National Basketball Association (NBA) rivalry between the Philadelphia 76ers and the Boston Celtics, the two teams have the most meetings in which playoffs are a best-of-seven elimination tournament among 16 teams in the Eastern Conference and Western Conference (called divisions, pre-1970), ultimately deciding the league's season champion in the NBA Finals?
{'answer': 'National Basketball Association (NBA) playoffs', 'supporting_facts': [['76ers–Celtics rivalry', 1], ['NBA playoffs', 0]]}