Text: Upriver, east of Blois, in a huge densely wooded park surrounded by 31 km (20 miles) of high walls, the brilliant white Ceteau de Chambord is the most extravagant of all the royal residences in the Loire Valley.
Entailment: There are high walls surrounding the Ceteau de Chambord.
Contradiction: The wooded park is wide open and available to anyone.