Complex sentence: Chapman was Palaeontologist to the National Museum, Melbourne, Australia from 1902-27 and served as the first Australian Commonwealth Palaeontologist 1927-35, where Irene Crespin was his assistant and later succeeded him.
Split into simpler sentences: Chapman was Palaeontologist to the National Museum, Melbourne, Australia from 1902-27. He then served as the first Australian Commonwealth Palaeontologist 1927-35, where Irene Crespin was his assistant and later succeeded him.