Original sentence: Calpurnia - the Finches' black housekeeper, who although she is a servant, is treated as a member of the family by the Finches, unusual in racist society that the book is set in
Edited sentence: Calpurnia - the Finches' black housekeeper, who although she is a servant, is treated as a member of the family by the Finches, unusual in the extremely racist society that the book is set in