Complex sentence: He attended McGill University in Montreal and graduated with an MDCM degree in 1876 (his thesis topic was chloroform) and he then went for post-graduate training at St Thomas's Hospital Medical School in London.
Split into simpler sentences: He attended McGill University in Montreal and graduated with an MDCM degree in 1876 (his thesis topic was chloroform). He then went for post-graduate training at St Thomas's Hospital Medical School in London.