Table schema:
CREATE TABLE table_name_76 (city_of_license VARCHAR, frequency_mhz VARCHAR, erp_w VARCHAR, class VARCHAR)

Question: What city of license has an ERP W smaller than 500, Class A, and Frequency MHz larger than 89.7?
SQL: SELECT city_of_license FROM table_name_76 WHERE erp_w < 500 AND class = "a" AND frequency_mhz > 89.7