Original sentence: Keckly resided in the Burwell house with her mother, and began official duties at age five when it was decided that because the Burwell's had four other children under the age of ten, that she would become the nursemaid for their infant daughter, Elizabeth Margaret
Edited sentence: Keckly resided in the Burwell house with her mother, and began official duties at age five when it was decided that, because the Burwells had four other children under the age of ten, she would become the nursemaid for their infant daughter, Elizabeth Margaret