Question: how long was the eiffel tower the tallest building in the world
[{'answer': '41 years', 'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 3, 'start_character': 292, 'end_paragraph_id': 3, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 676, 'bleu_score': 0.7983761138499471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17287181364132109869}, 'section': 'Section::::Abstract.'}]}]