Question: where did the machu picchu stones come from
[{'answer': 'the quarry at the site', 'provenance': [{'wikipedia_id': '80019', 'title': 'Machu Picchu', 'start_paragraph_id': 56, 'start_character': 284, 'end_paragraph_id': 56, 'end_character': 306, 'bleu_score': 1.0, 'section': 'Section::::Site.:Construction.\n'}]}, {'provenance': [{'wikipedia_id': '80019', 'title': 'Machu Picchu', 'start_paragraph_id': 56, 'start_character': 0, 'end_paragraph_id': 56, 'end_character': 739, 'bleu_score': 0.9538330902093691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2176585553896777566}, 'section': 'Section::::Site.:Construction.\n'}]}]