instruction: give me the saturday morning flights from CHICAGO to ST. PAUL on CO that have meals
response: SELECT DISTINCT flight_id FROM flight WHERE (((((flight_days IN (SELECT DAYSalias0.days_code FROM days AS DAYSalias0 WHERE DAYSalias0.day_name IN (SELECT DATE_DAYalias0.day_name FROM date_day AS DATE_DAYalias0 WHERE DATE_DAYalias0.day_number = 26 AND DATE_DAYalias0.month_number = 7 AND DATE_DAYalias0.year = 1991)) AND meal_code IN (SELECT FOOD_SERVICEalias0.meal_code FROM food_service AS FOOD_SERVICEalias0)) AND to_airport IN (SELECT AIRPORT_SERVICEalias1.airport_code FROM airport_service AS AIRPORT_SERVICEalias1 WHERE AIRPORT_SERVICEalias1.city_code IN (SELECT CITYalias1.city_code FROM city AS CITYalias1 WHERE CITYalias1.city_name = 'ST. PAUL'))) AND from_airport IN (SELECT AIRPORT_SERVICEalias0.airport_code FROM airport_service AS AIRPORT_SERVICEalias0 WHERE AIRPORT_SERVICEalias0.city_code IN (SELECT CITYalias0.city_code FROM city AS CITYalias0 WHERE CITYalias0.city_name = 'CHICAGO'))) AND departure_time BETWEEN 0 AND 1200) AND airline_code = 'CO')