Complex sentence: The cemetery was damaged by Hurricane Hazel in 1954, afterwhich most of the headstones moved, though 23 standing headstones remained, delineating both individual and family plots.
Split into simpler sentences: The cemetery was damaged by Hurricane Hazel in 1954, afterwhich most of the headstones moved. However, 23 standing headstones remained, delineating both individual and family plots.