Question: which emperor established a new capital from which the byzantine empire arose
[{'answer': 'Constantine I', 'provenance': [{'wikipedia_id': '16972981', 'title': 'Byzantine Empire', 'start_paragraph_id': 2, 'start_character': 150, 'end_paragraph_id': 2, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16972981', 'title': 'Byzantine Empire', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 782, 'bleu_score': 0.6947347871564771, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10330603973259598917}, 'section': 'Section::::Abstract.'}]}]