Complex sentence: On January 22,2006, his son, Robert A. Schuller, took over as senior pastor of Crystal Cathedral, but was removed from that position on October 25,2008, by his father, who cited "a lack of shared vision".
Split into simpler sentences: On January 22,2006, Robert A. Schuller assumed the role of senior pastor of Crystal Cathedral. On October 25,2008, the junior Shuller was removed from that position by the senior Schuller, (7) who cited "a lack of shared vision".