Anchor: La Porte Noire, a Roman arch on the Rue de la Convention, leads you to the 12th-century Cathedrale Saint-Jean.
Entailed: La Porte Noire is a Roman arch.
Contradiction: La Porte Noire is in Paris.
Contradiction: A street performing is dancing.
Contradiction: You didn't think about the city/sales tax before, but now you do; it might be 7%.
Contradiction: This conversation is normal and not at all gruesome.  
Contradiction: A girl is watching something.