Text: The strangest of the cathedral's treasures is contained in an urn here the heart of Alfonso the Wise, bequeathed to Murcia by the 13th-century king long before his death.
Entailment: The urn in the heart of Alfonso the Wise is the strangest treasure the cathedral has.
Contradiction: The urn in the heart of Alfonso the Wise isn't remotely close to being one of the strangest treasures the cathedral has.