Question: when was the last time the royals won a world series
[{'answer': '2015', 'provenance': [{'wikipedia_id': '16883', 'title': 'Kansas City Royals', 'start_paragraph_id': 1, 'start_character': 330, 'end_paragraph_id': 1, 'end_character': 334, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16883', 'title': 'Kansas City Royals', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 0.9679895851501501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13117916525618969735}, 'section': 'Section::::Abstract.'}]}]