Complex sentence: Mario moved to Spain with his family in 1975 and returned to the U.S. in 1978 to attend Rutgers University, where he majored in Spanish Language, Theatre and Economics, and graduated in 1982.
Split into simpler sentences: Mario moved to Spain with his family in 1975 and returned to the U.S. in 1978 to attend Rutgers University. There, he double majored in Spanish Language, Theatre and Economics, graduating in 1982.