What is the call sign for a class of A?
CREATE TABLE table_name_69 (call_sign VARCHAR, class VARCHAR)
SELECT call_sign FROM table_name_69 WHERE class = "a"
### Context: CREATE TABLE table_name_69 (call_sign VARCHAR, class VARCHAR) ### Question: What is the call sign for a class of A? ### Answer: SELECT call_sign FROM table_name_69 WHERE class = "a"