Question: who played in the world series in 2015
[{'answer': 'New York Mets', 'provenance': [{'wikipedia_id': '40627800', 'title': '2015 World Series', 'start_paragraph_id': 1, 'start_character': 208, 'end_paragraph_id': 1, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Kansas City Royals', 'provenance': [{'wikipedia_id': '40627800', 'title': '2015 World Series', 'start_paragraph_id': 1, 'start_character': 260, 'end_paragraph_id': 1, 'end_character': 278, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40627800', 'title': '2015 World Series', 'start_paragraph_id': 1, 'start_character': 96, 'end_paragraph_id': 1, 'end_character': 837, 'bleu_score': 0.868529392348871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6168885503996493773}, 'section': 'Section::::Abstract.'}]}]