user: Question: Who won the ABA Championship in 1971?
Columns: ['Teams', 'Finals appearances', 'Championships', 'Runners-up', 'Years won', 'Years runners-up']
Types: ['text', 'real', 'real', 'real', 'text', 'text']
Sample row: ['Indiana Pacers', 5.0, 3.0, 2.0, '1970, 1972, 1973', '1969, 1975']
SQL:

assistant: SELECT "Championships" FROM "Table" WHERE "Years won" = '1971';