Question: what is the name of the tallest building in the world located in dubai
[{'answer': 'Burj Khalifa', 'provenance': [{'wikipedia_id': '794957', 'title': 'Burj Khalifa', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '794957', 'title': 'Burj Khalifa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 333, 'bleu_score': 0.604091076827534, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9331021822453315353}, 'section': 'Section::::Abstract.'}]}]