Question: how many eiffel towers are there in the world
[{'answer': 'over 50', 'provenance': [{'wikipedia_id': '31655286', 'title': 'Eiffel Tower replicas and derivatives', 'start_paragraph_id': 1, 'start_character': 130, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31655286', 'title': 'Eiffel Tower replicas and derivatives', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4399980671473223026}, 'section': 'Section::::Abstract.'}]}]