Complex sentence: Vampires in the Twilight world are different from most other literary vampires in the fact that they have very few weaknesses-they are not harmed by holy water, the sun, garlic, or crosses.
Split into simpler sentences: Vampires in the Twilight world are different from most other literary vampires. One fact is that they have very few weaknesses-they are not harmed by holy water, the sun, garlic, or crosses.