Complex sentence: Shemiran used to be the summer residence of the Qajar and Pahlavi kings who built several palace complexes and villas in the area, examples are the Sa'dabad Palace Complex and the Niavaran Palace Complex.
Split into simpler sentences: Shemiran used to be the summer residence of the Qajar and Pahlavi kings who built several palace complexes and villas in the area. Some examples are the Sa'dabad Palace Complex and the Niavaran Palace Complex.