instruction: what about the EA flights arriving in PITTSBURGH between 1200 and 1600 in the afternoon
response: SELECT DISTINCT flight.flight_id FROM airport_service, city, flight WHERE ((flight.arrival_time <= 1600 AND flight.arrival_time >= 1200) AND city.city_code = airport_service.city_code AND city.city_name = 'PITTSBURGH' AND flight.to_airport = airport_service.airport_code) AND flight.airline_code = 'EA'