SELECT T1.facility_code FROM Apartment_Facilities AS T1 JOIN Apartments AS T2 ON T1.apt_id  =  T2.apt_id WHERE T2.bedroom_count  >  4
Show the facility codes of apartments with more than 4 bedrooms.
[Schema (values) (types)]: | apartment_rentals |  Apartment_Buildings : building_id (text) , building_short_name (number) , building_full_name (text) , building_description (text) , building_address (text) , building_manager (text) , building_phone (text) | Apartments : apt_id (text) , building_id (number) , apt_type_code (text) , apt_number (text) , bathroom_count (text) , bedroom_count (text) , room_count (text) | Apartment_Facilities : apt_id (text) , facility_code (number) | Guests : guest_id (text) , gender_code (number) , guest_first_name (text) , guest_last_name (text) , date_of_birth (text) | Apartment_Bookings : apt_booking_id (text) , apt_id (number) , guest_id (text) , booking_status_code (text) , booking_start_date (text) , booking_end_date (text) | View_Unit_Status : apt_id (text) , apt_booking_id (number) , status_date (text) , available_yn (text);