Question: Which of these structures is older, Nusretiye Clock Tower or Dolmabahçe Clock Tower?
{'answer': 'Nusretiye Clock Tower', 'supporting_facts': [['Nusretiye Clock Tower', 0], ['Nusretiye Clock Tower', 1], ['Dolmabahçe Clock Tower', 0], ['Dolmabahçe Clock Tower', 1]]}