Complex sentence: The story of Adolf Hitler's visit to Liverpool has remained popular, however, and was the subject of Beryl Bainbridge's 1978 novel "Young Adolf" and Grant Morrison and Steve Yeowell's notorious 1989 comic "The New Adventures of Hitler".
Split into simpler sentences: The story of Adolf Hitler's visit to Liverpool has remained popular, however. It the subject of Grant Morrison and Steve Yeowell's notorious 1989 comic book "The New Adventures of Hitler".