Complex sentence: He also attempted to expand the school into what he called a "City of the Arts" this eventually became the merger of Chouinard and Los Angeles Conservatory of Music into the California Institute of the Arts in 1961.
Split into simpler sentences: He also attempted to expand the school into what he called a "City of the Arts". This eventually led to the merger of Chouinard and Los Angeles Conservatory of Music into the California Institute of the Arts in 1961.