Complex sentence: His father was the head of the theatrical firm J. C. Williamson's in the 1920s,and subsequently Efftee Studios, in the 1930s, in Melbourne, Australia, and has been anachronistically claimed to have been the inventor of the clapperboard.
Split into simpler sentences: His father was the head of the theatrical firm J. C. Williamson's in the 1920s, and subsequently Efftee Studios in the 1930s, in Melbourne, Australia. He has been anachronistically claimed to have been the inventor of the clapperboard.