Complex sentence: He completed training at the C.G. Jung Institute of Los Angeles in 1961 and practiced as an analyst until he left the Jung Institute in 1970 and formally resigned as an analyst in 1974.
Split into simpler sentences: He completed training at the C.G. Jung Institute of Los Angeles in 1961. He practiced as an analyst until he left the Jung Institute in 1970 and formally resigned as an analyst in 1974.