Complex sentence: As costs escalated and difficulties developed during construction (supervised by Frank Lloyd Wright's son, Lloyd Wright), the owners took over after the superstructure reached the windows and carried out various changes, deviating from Wright's original design.
Split into simpler sentences: As costs escalated difficulties developed during construction, supervised by Frank Lloyd Wright's son, Lloyd Wright. The owners took over after the superstructure reached the windows and carried out various changes, deviating from Wright's original design.