Complex sentence: The burial ground, however, maintains a strict separation, not by gender but by religious affiliation; there are three section, one for Quakers, one for non-Quakers, and one for distant relatives of both.
Split into simpler sentences: The burial ground, however, maintains strict separation, not by gender but by religious affiliation. The graveyard is divided into three section, one for Quakers, one for non-Quakers, and one for distant relatives of both.