Complex sentence: He was arrested in February 1944 when the German occupiers discovered several undercover newspapers, spent time imprisoned at Møllergata 19, and perished during transport to Germany with the ship SS "Westfalen" in September 1944.
Split into simpler sentences: He was arrested in February 1944 when the German occupiers discovered several undercover newspapers. Moen spent time imprisoned at Møllergata 19, and he perished during transport to Germany with the ship SS "Westfalen" in September 1944.