Complex sentence: He was elected in 1990 to the National Academy of Design, founded in 1825, which is the oldest professional arts association in the United States as a National Academician at The National Academy of Design, New York, New York.
Split into simpler sentences: He was elected as an Academician in 1990 to the National Academy of Design, founded in 1825. It is the oldest professional arts association in the United States The National Academy of Design, New York, New York.