instruction: describe PITTSBURGH airport
response: SELECT DISTINCT airport.airport_code, airport.airport_location, airport.airport_name, airport.country_name, airport.minimum_connect_time, airport.state_code, airport.time_zone_code FROM airport, airport_service, city WHERE airport.airport_code = airport_service.airport_code AND city.city_code = airport_service.city_code AND city.city_name = 'PITTSBURGH'