Question: who took over the direction of the st. petersburg ballet in 1869
[{'answer': 'Marius Ivanovich Petipa', 'provenance': [{'wikipedia_id': '1709914', 'title': 'Marius Petipa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1709914', 'title': 'Marius Petipa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 260, 'bleu_score': 0.5168445800652001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1079738478808888626}, 'section': 'Section::::Abstract.'}]}]