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_50 (class_aAA VARCHAR, school_year VARCHAR)
### Question:
what AAA class has a school year of 1989-90?
### Answer:
SELECT class_aAA FROM table_name_50 WHERE school_year = "1989-90"