Original sentence: List of National Natural Landmarks.The swamp is the home of the Francis Beidler Forest a 15,000-acre (61 km²) nature preserve of virgin cypress and tupelo forest jointly operated by the Audubon Society and the Nature Conservancy
Edited sentence: The swamp is the home of the Francis Beidler Forest, a  nature preserve of virgin cypress and tupelo forest jointly operated by the Audubon Society and the Nature Conservancy