Complex sentence: He taught at McGill University (1974-1993) and the University of Pennsylvania (1993-2012), and served on the U.S. Commission of Fine Arts from 2004 to 2012.
Split into simpler sentences: He taught at McGill University (1974-1993) and the University of Pennsylvania (1993-2012). He served on the U.S. Commission of Fine Arts from 2004 to 2012.