Complex sentence: A.B Wilson's son Ronald Martin Wilson came to work at the practice from 1908 where he became chief assistant and then his partner in 1920 he then took over the practice after A.B Wilson's passing in 1938.
Split into simpler sentences: A.B Wilson's son Ronald Martin Wilson came to work at the practice from 1908 where he became chief assistant and then his partner in 1920. He then took over the practice after A.B Wilson's passing in 1938.