Question: when did machu picchu become a wonder of the world
[{'answer': '2007', 'provenance': [{'wikipedia_id': '80019', 'title': 'Machu Picchu', 'start_paragraph_id': 4, 'start_character': 109, 'end_paragraph_id': 4, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '80019', 'title': 'Machu Picchu', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 208, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12480672142444069115}, 'section': 'Section::::Abstract.'}]}]