Question: when was the new denver broncos stadium built
[{'answer': '2001', 'provenance': [{'wikipedia_id': '501440', 'title': 'Broncos Stadium at Mile High', 'start_paragraph_id': 1, 'start_character': 384, 'end_paragraph_id': 1, 'end_character': 388, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '501440', 'title': 'Broncos Stadium at Mile High', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 559, 'bleu_score': 0.9076532530671391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17305481017563092030}, 'section': 'Section::::Abstract.'}]}]