Complex sentence: Although Dr. Frankenstein had a hunchback assistant in the 1931 film "Frankenstein", his name was Fritz; in the original Mary Shelley novel, Dr. Frankenstein has no lab assistant nor does a character named Igor appear.
Split into simpler sentences: Although Dr. Frankenstein had a hunchback assistant in the 1931 film "Frankenstein", his name was Fritz. However, in the original Mary Shelley novel, Dr. Frankenstein has no lab assistant nor does a character named Igor appear.