CREATE TABLE Apartments (apt_id VARCHAR(255), apt_type_code VARCHAR(255)); CREATE TABLE Apartment_Bookings (booking_start_date VARCHAR(255), apt_id VARCHAR(255))
What are the booking start and end dates of the apartments with type code "Duplex"?
    
SQL: SELECT T1.booking_start_date, T1.booking_start_date FROM Apartment_Bookings AS T1 JOIN Apartments AS T2 ON T1.apt_id = T2.apt_id WHERE T2.apt_type_code = "Duplex"