Question: when's the last time the mets won the world series
[{'answer': '2000', 'provenance': [{'wikipedia_id': '40627800', 'title': '2015 World Series', 'start_paragraph_id': 6, 'start_character': 376, 'end_paragraph_id': 6, 'end_character': 380, 'bleu_score': 1.0, 'section': 'Section::::Background.:New York Mets.\n'}]}, {'provenance': [{'wikipedia_id': '40627800', 'title': '2015 World Series', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 447, 'bleu_score': 0.900781798891443, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15924026060012080441}, 'section': 'Section::::Background.:New York Mets.\n'}]}]