Question: Which Established has a League of Ontario Australian Football League?
SQL: SELECT "Established" FROM "2-178833-4" WHERE "League" = 'Ontario Australian Football League';

Question: Which Championships have a League of Ontario Australian Football League?
SQL: SELECT "Championships" FROM "2-178833-4" WHERE "League" = 'Ontario Australian Football League';

Question: Which Established has a Club of Guelph Rangers?
SQL: SELECT "Established" FROM "2-178833-4" WHERE "Club" = 'Guelph Rangers';