CREATE TABLE table_name_22 (previous_conference VARCHAR(255), ihsaa_class___football_soccer VARCHAR(255), year_joined VARCHAR(255))
Which Previous Conference has an IHSAA Class/ Football/ Soccer of 4a/5a/2a, and a Year Joined larger than 1926?
    
SQL: SELECT previous_conference FROM table_name_22 WHERE ihsaa_class___football_soccer = "4a/5a/2a" AND year_joined > 1926