Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_61 (size VARCHAR, school VARCHAR, _number___county VARCHAR, year_joined VARCHAR, ihsaa_class VARCHAR)
### Question:
What's the size of Centerville in 89 Wayne county with an IHSAA class of AA in the year before 1974?
### Answer:
SELECT size FROM table_name_61 WHERE year_joined < 1974 AND ihsaa_class = "aa" AND _number___county = "89 wayne" AND school = "centerville"