Complex sentence: After working on "Soldier", Williamson left the music business and concentrated on his career in electronics and in 1982 received an electrical engineering degree from California State Polytechnic University, Pomona.
Split into simpler sentences: After working on "Soldier", Williamson left the music business entirely to concentrate on his studies. In 1982, he received an electrical engineering degree from California State Polytechnic University, Pomona.