Question: Which location, Nusretiye Mosque and Dolmabahçe Palace served as the main administrative center of the Ottoman Empire from 1856 to 1887 and 1909 to 1922?
{'answer': 'Dolmabahçe Palace', 'supporting_facts': [['Nusretiye Mosque', 0], ['Dolmabahçe Palace', 0]]}