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

### Instruction:
what is the correct year for # / county of 09 cass?

### Inputs:
table_name: table, columns: ['School', 'Location', 'Mascot', '# / County', 'IHSAA Class', 'Year Joined', 'Previous Conference']

### Response:
SELECT Year Joined FROM table WHERE # / County = 09 cass