query: when did celtics win the championship?
answers: [ ' 1 9 6 9 N B A F i n a l s ' , ' 1 9 8 6 N B A F i n a l s ' , ' 2 0 0 8 N B A F i n a l s ' , ' 1 9 7 4 N B A F i n a l s ' , ' 1 9 8 4 N B A F i n a l s ' , ' 1 9 6 5 N B A F i n a l s ' , ' 1 9 6 6 N B A F i n a l s ' , ' 1 9 7 6 N B A F i n a l s ' , ' 1 9 8 1 N B A F i n a l s ' , ' 1 9 6 8 N B A F i n a l s ' ]