Complex sentence: Young grew up in the Lower East Side, Manhattan attended R.J.J. and Seward Park High School, and City University of New York (CUNY), majored in sociology and psychology.
Split into simpler sentences: Young grew up in the Lower East Side of Manhattan. He attended R.J.J. and Seward Park High School and the City University of New York (CUNY), where he majored in sociology and psychology.