What city of license has an ERP W smaller than 500, Class A, and Frequency MHz larger than 89.7?
CREATE TABLE "network" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "height_m_ft" text,
  "class" text,
  "fcc_info" text
);
SELECT "city_of_license" FROM "network" WHERE "erp_w"<500 AND "class"='a' AND "frequency_m_hz">89.7;