Complex sentence: He was expelled from the Soviet Union in 1979 with a group of other dissidents, Alexander Ginzburg, Eduard Kuznetsov, Mark Dymshits and Valentin Moroz.
Split into simpler sentences: He was expelled from the Soviet Union with a group of other dissidents in 1979. The other dissidents expelled with him were Alexander Ginzburg, Eduard Kuznetsov, Mark Dymshits and Valentin Moroz.