Question: when was the pyramid of the sun built
[{'answer': 'about 200 CE', 'provenance': [{'wikipedia_id': '3259635', 'title': 'Pyramid of the Sun', 'start_paragraph_id': 1, 'start_character': 97, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3259635', 'title': 'Pyramid of the Sun', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 358, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10651935976241687716}, 'section': 'Section::::Abstract.'}]}]