user: Question: Which school joined in 1971 and left in 1975?
Columns: ['School', 'Location', 'Mascot', 'IHSAA Class', 'County', 'Year Joined', 'Year Left', 'Conference Joined']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Bethany Christian', 'Goshen', 'Bruins', 'N/A', '20 Elkhart', '1971 1987', '1981 1988', 'independent']
SQL:

assistant: SELECT "School" FROM "Table" WHERE "Year Joined" = '1971' AND "Year Left" = '1975';