Text: Farther along the Via Appia are three of Rome's most celebrated catacombs, including those of St. Calesto, the largest of some 50 underground Christian cemeteries.
Entailment: St. Calesto, Rome's largest catacombs, is located on the Via Appia.
Contradiction: The site of St. Calesto, one of Rome's smaller underground Christian cemeteries, has been lost to the ravages of time.