Complex sentence: He was working on the book of memoirs in Portuguese, "Bucareste-Estação Norte" ("Bucharest-Northern Station"), which came out at Edições o Cruzeiro in 1961.
Split into simpler sentences: He was working on the book of memoirs in Portuguese, "Bucareste-Estação Norte" ("Bucharest-Northern Station"). It came out at Edições o Cruzeiro in 1961.