Question: who is the tallest person to have ever lived
[{'answer': 'Robert Pershing Wadlow', 'provenance': [{'wikipedia_id': '359117', 'title': 'Robert Wadlow', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '359117', 'title': 'Robert Wadlow', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 239, 'bleu_score': 0.7988335681808141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8586118540455764829}, 'section': 'Section::::Abstract.'}]}]