Question: where is the next world fair to be held
[{'answer': 'Dubai , United Arab Emirates', 'provenance': [{'wikipedia_id': '50268', 'title': "World's fair", 'start_paragraph_id': 106, 'start_character': 26, 'end_paragraph_id': 106, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Current and upcoming expositions.:2020 Dubai.\n'}]}, {'provenance': [{'wikipedia_id': '50268', 'title': "World's fair", 'start_paragraph_id': 106, 'start_character': 0, 'end_paragraph_id': 106, 'end_character': 81, 'bleu_score': 0.861173529963367, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5296921060946592436}, 'section': 'Section::::Current and upcoming expositions.:2020 Dubai.\n'}]}]