Text: Next to the mosque are the Theodosian Walls, pierced here by the Adrianople Gate (Edirnekap??), where Mehmet the Conqueror entered the fallen city in 1453.
Entailment: Mehmet the Conqueror came into the city when he conquered it in 1453.
Contradiction: Mehmet the Conqueror entered the city for the first time in 1455.