Question: who conducted the orchestra at the opening of the carnegie hall in 1891
[{'answer': 'Walter Damrosch', 'provenance': [{'wikipedia_id': '169321', 'title': 'Carnegie Hall', 'start_paragraph_id': 21, 'start_character': 403, 'end_paragraph_id': 21, 'end_character': 418, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '169321', 'title': 'Carnegie Hall', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 989, 'bleu_score': 0.9582713128760101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4465469416478277500}, 'section': 'Section::::History.\n'}]}]