What is the ICAO with commenced operations before 1989?
CREATE TABLE table_name_2 (icao VARCHAR, commenced_operations INTEGER)
SELECT icao FROM table_name_2 WHERE commenced_operations < 1989
### Context: CREATE TABLE table_name_2 (icao VARCHAR, commenced_operations INTEGER) ### Question: What is the ICAO with commenced operations before 1989? ### Answer: SELECT icao FROM table_name_2 WHERE commenced_operations < 1989