Text: Before Paris became the national capital, it was the home of the medieval dukes of the region that is still known as the Ile-de-France ' which, by gradually asserting itself over other duchies such as Burgundy and Normandy, imposed its name on the whole country.
Entailment: Paris's status as the French capital comes from its history of being home to most of the medieval dukes in the region.
Contradiction: Paris has never been the capital of France.