Question: when did melbourne last win a grand final
[{'answer': '1960', 'provenance': [{'wikipedia_id': '97831', 'title': 'Melbourne Football Club', 'start_paragraph_id': 25, 'start_character': 333, 'end_paragraph_id': 25, 'end_character': 337, 'bleu_score': 1.0, 'section': 'Section::::History.:1933–1964: Age of greatness.\n'}]}, {'provenance': [{'wikipedia_id': '97831', 'title': 'Melbourne Football Club', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 380, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2069617076810928294}, 'section': 'Section::::History.:1933–1964: Age of greatness.\n'}]}]