Question: what is the biggest tower in the world today
[{'answer': 'Tokyo Skytree', 'provenance': [{'wikipedia_id': '34080', 'title': 'List of tallest buildings and structures', 'start_paragraph_id': 1, 'start_character': 338, 'end_paragraph_id': 1, 'end_character': 351, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34080', 'title': 'List of tallest buildings and structures', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 135, 'bleu_score': 0.7010615979282331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12252490579365473893}, 'section': 'Section::::Tallest towers.\n'}]}]