I want the ICAO for city of xi'an
CREATE TABLE table_name_51 (icao VARCHAR, city VARCHAR)
SELECT icao FROM table_name_51 WHERE city = "xi'an"
### Context: CREATE TABLE table_name_51 (icao VARCHAR, city VARCHAR) ### Question: I want the ICAO for city of xi'an ### Answer: SELECT icao FROM table_name_51 WHERE city = "xi'an"