Qual é o tamanho de Centerville, no condado de Wayne, com uma classe de AA da IHSAA no ano anterior a 1974?
CREATE TABLE table_name_61 (size VARCHAR, school VARCHAR, _number___county VARCHAR, year_joined VARCHAR, ihsaa_class VARCHAR)
SELECT size FROM table_name_61 WHERE year_joined < 1974 AND ihsaa_class = "aa" AND _number___county = "89 wayne" AND school = "centerville"