Question: where was the first world fair held in us
[{'answer': 'New York City', 'provenance': [{'wikipedia_id': '143746', 'title': "List of world's fairs", 'start_paragraph_id': 14, 'start_character': 19, 'end_paragraph_id': 14, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::1820s.\n'}]}, {'provenance': [{'wikipedia_id': '143746', 'title': "List of world's fairs", 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 73, 'bleu_score': 0.7860753021519781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2723692642863912469}, 'section': 'Section::::1820s.\n'}]}]