Question: when is the last time the mets won a world series
[{'answer': '1986', 'provenance': [{'wikipedia_id': '21728', 'title': 'New York Mets', 'start_paragraph_id': 9, 'start_character': 74, 'end_paragraph_id': 9, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.\n'}]}]