What are the start date and end date of the apartment bookings made by female guests (gender code "Female")?
SELECT T1.booking_start_date ,  T1.booking_start_date FROM Apartment_Bookings AS T1 JOIN Guests AS T2 ON T1.guest_id  =  T2.guest_id WHERE T2.gender_code  =  "Female"
apartment bookings made by female guests refers to a JOIN operation between Apartment_Bookings and Guests tables on guest_id with a WHERE condition on gender_code = 'Female'; start date and end date of the bookings refers to booking_start_date and booking_end_date (assuming the second instance of booking_start_date is intended to be booking_end_date);