Question: the fall of constantinople led to the breakup of
[{'answer': 'the Byzantine Empire', 'provenance': [{'wikipedia_id': '102674', 'title': 'Fall of Constantinople', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 91, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '102674', 'title': 'Fall of Constantinople', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 403, 'bleu_score': 0.7839481592655221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2858647022506007306}, 'section': 'Section::::Abstract.'}]}]