TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: harry potter is a series of seven fantasy novels written by british author j. k. rowling.

SOLUTION: harry potter is a group of seven fantasy books written by british author j. k. rowling.

PROBLEM: towards the end of 1997 , each band member chose an individual number as their alias.

SOLUTION: towards the end of 1997 , each band member selected a unique number as their false name.

PROBLEM: how much less depends on the type of raid.

SOLUTION:
the type of raid determines how much less it is.