Complex sentence: Mazzone-Clementi moved to Copenhagen, Denmark in 1984 and founded another theater school there, named the Comedia School, and in 1994 returned to California and continued teaching until shortly before his death on 5 November 2000 in San Francisco.
Split into simpler sentences: Mazzone-Clementi moved to Copenhagen, Denmark in 1984 and founded a second sister theater school there, named the Commedia School. In 1994 returned to California and continued teaching until shortly before his death on 5 November 2000 in San Francisco.