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

### Instruction:
what is the enrollement for the year joined 1958 in clarksville?

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

### Response:
SELECT SUM Enrollment FROM table WHERE Year Joined = 1958 AND Location = clarksville