Complex sentence: He then began his psychiatric training and in 1957 he passed the Diploma of Psychological Medicine, and then in 1971 he was elected MRCPsych, proceeding FRCPsych in 1976.
Split into simpler sentences: He then began his psychiatric training, and in 1957, he passed the Diploma of Psychological Medicine. In 1971, he was elected MRCPsych, proceeding FRCPsych in 1976.