Question: who led 21 elephants across the brooklyn bridge in 1884
[{'answer': 'Jumbo', 'provenance': [{'wikipedia_id': '47742', 'title': 'Brooklyn Bridge', 'start_paragraph_id': 54, 'start_character': 833, 'end_paragraph_id': 54, 'end_character': 838, 'bleu_score': 1.0, 'section': 'Section::::History.:Opening.\n'}]}]