user: ### NOW ANSWER:
Question: what is the enrollement for the year joined 1958 in Clarksville?
Columns: ['School', 'Location', 'Mascot', 'Enrollment', 'IHSAA Class', '# / County', 'Year Joined']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'real']
Sample row: ['Austin *', 'Austin', 'Eagles', 437.0, 'AA', '72 Scott', 1958.0]
SQL:

assistant: SELECT SUM("Enrollment") FROM "Table" WHERE "Year Joined" = 1958.0 AND "Location" = 'Clarksville';