user: Question: What is the IHSAA Class for football for the team joining in 1968?
Columns: ['School', 'City', 'Team Name', 'Enrollment 08-09', 'IHSAA Class', 'IHSAA Class Football', 'County', 'Year Joined']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text', 'real']
Sample row: ['Benton Central', 'Oxford', 'Bisons', 612.0, 'AAA', 'AAA', '04 Benton', 1968.0]
SQL:

assistant: SELECT "IHSAA Class Football" FROM "Table" WHERE "Year Joined" = 1968.0;