Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who won the ABA Championship in 1971?

### Inputs:
table_name: table, columns: ['Teams', 'Finals appearances', 'Championships', 'Runners-up', 'Years won', 'Years runners-up']

### Response:
SELECT MIN Championships FROM table WHERE Years won = 1971