Complex sentence: Eventually Genevieve L. Rader, who began her study with Walter in 1921, went on with his master's work and in the early 1960s she moved the organization's headquarters from Aurora to Pacific Palisades in California.
Split into simpler sentences: Eventually Genevieve L. Rader, who began her study with Walter in 1921, continued his work. In the early 1960s she moved the organization's headquarters from Aurora to Pacific Palisades in California.