Complex sentence: The interior of No.15 includes pine-paneled rooms and two carved wooden staircases, five thousand square feet of living space in the main house and a-long walled garden with a small cottage at the end.
Split into simpler sentences: The interior of No.15 includes pine-paneled rooms and two carved wooden staircases. It has five thousand square feet of living space in the main house and a-long walled garden with a small cottage at the end.