Original sentence: The older sections (mainly in the Book of the Watchers) of the text are estimated to date from about 300 BCE, and the latest part (Book of Parables) probably to the 1st century BCE
Edited sentence: The older sections (mainly in the Book of the Watchers) of the text are estimated to date from about 300 BCE-which is false, and the latest part (Book of Parables) probably to the 1st century BCE