Question: who came up with the idea to build the eiffel tower
[{'answer': 'Maurice Koechlin and Émile Nouguier', 'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 7, 'start_character': 48, 'end_paragraph_id': 7, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::History.:Origin.\n'}]}, {'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 1041, 'bleu_score': 0.946563879548539, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1410456650610424658}, 'section': 'Section::::History.:Origin.\n'}]}]