Question: when was the kansas city royals stadium built
[{'answer': '1973', 'provenance': [{'wikipedia_id': '329883', 'title': 'Kauffman Stadium', 'start_paragraph_id': 1, 'start_character': 415, 'end_paragraph_id': 1, 'end_character': 419, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '329883', 'title': 'Kauffman Stadium', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 540, 'bleu_score': 0.9553520562799491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17822909677125183868}, 'section': 'Section::::Abstract.'}]}]