Task: Text Simplification
Input (English): according to the fictional universe first established by slayer , the ' buffyverse , ' the term ' buffyverse ' is used amongst fans of buffy / angel online to describe the fictional universe established by buffy / angel.
Output (English): in the fake world of " buffyverse " created by slayer , the name of the world is used by people who like buffy and angel on the internet playing , to explain the world they created.