Complex sentence: After an expansion of the compounds, Reza Shah of the Pahlavi Dynasty lived there in the 1920s, and his son, Mohammad Reza Pahlavi, moved there in the 1970s.
Split into simpler sentences: After an expansion of the compounds, Reza Shah lived there in the 1920s. And his son, Mohammad Reza Pahlavi moved there in the 1970s.