Complex sentence: The cemetery also contains the burial grounds of Saint Brigid's Cemetery (formerly a part of Saint Brigid's Roman Catholic Church), a cemetery founded in 1856 that was eventually absorbed into the assests-management of Cemetery of the Holy Rood or Catholic Cemeteries.
Split into simpler sentences: The cemetery also contains the burial grounds of Saint Brigid's Cemetery (formerly a part of Saint Bridig's Roman Catholic Church). A cemetery founded in 1856 that was eventually absorped into the assests-management of Cemetery of the Holy Rood or Catholic Cemeteries.