Complex sentence: Prince Christian Victor Albert Ludwig Ernst Anton, Heir of Norway, Duke of Schleswig-Holstein GCB GCVO (1867-1900) was a grandson of Queen Victoria and the eldest son of Princess Helena, daughter of the Queen.
Split into simpler sentences: Prince Christian Victor Albert Ludwig Ernst Anton, Heir of Norway, Duke of Schleswig-Holstein GCB GCVO (1867-1900) was a member of the British Royal Family. He was a grandson of Queen Victoria and the eldest son of Princess Helena, daughter of the Queen.