Question: where was the 1893 world's fair held
[{'answer': 'Chicago', 'provenance': [{'wikipedia_id': '41960', 'title': "World's Columbian Exposition", 'start_paragraph_id': 1, 'start_character': 124, 'end_paragraph_id': 1, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41960', 'title': "World's Columbian Exposition", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 704, 'bleu_score': 0.9829771687435411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1795853523203246430}, 'section': 'Section::::Abstract.'}]}]