Complex sentence: He earned a BS in Mechanical Engineering (1984-1988) and an MS in Manufacturing Systems Engineering (1988-1989) from Stanford University and an M.B.A. from the Stanford Graduate School of Business (1992-1994).
Split into simpler sentences: He earned a BS in Mechanical Engineering (1984-1988) and an MS in Manufacturing Systems Engineering (1988-1989) from Stanford University. He returned to Stanford for an M.B.A. from the Graduate School of Business (1992-1994).