Question: how many levels are there on the eiffel tower
[{'answer': 'three', 'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 4, 'start_character': 14, 'end_paragraph_id': 4, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 508, 'bleu_score': 0.897889200461868, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17865823971608616642}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9232', 'title': 'Eiffel Tower', 'section': 'Section::::Abstract.', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ["The tower has three levels for visitors, with restaurants on the first and second levels. The top level's upper platform is above the ground the highest observation", "The tower has three levels for visitors, with restaurants on the first and second levels. The top level's upper platform is above the ground the highest observation deck accessible to the public in the European Union.", 'The tower has three levels for visitors, with restaurants on the first and second levels.']}}]}]