What city has the A Class licence?
CREATE TABLE table_79789 (
    "Call sign" text,
    "Frequency" text,
    "City of license" text,
    "Facility ID" real,
    "ERP / Power W" real,
    "Height m ( ft )" text,
    "Class" text,
    "FCC info" text
)
SELECT "City of license" FROM table_79789 WHERE "Class" = 'a'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What city has the A Class licence? ### Input: CREATE TABLE table_79789 (
    "Call sign" text,
    "Frequency" text,
    "City of license" text,
    "Facility ID" real,
    "ERP / Power W" real,
    "Height m ( ft )" text,
    "Class" text,
    "FCC info" text
) ### Response: SELECT "City of license" FROM table_79789 WHERE "Class" = 'a'