Question: when did calgary stampeders win the grey cup
[{'answer': '2014', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 24, 'start_character': 17, 'end_paragraph_id': 24, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:2008–2015: Hufnagel years.\n'}]}, {'answer': '2008', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 22, 'start_character': 11, 'end_paragraph_id': 22, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:2003–2007: Coaching carousel.\n'}]}, {'answer': '2001', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 18, 'start_character': 697, 'end_paragraph_id': 18, 'end_character': 701, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1990–2002: Wally Buono era.\n'}]}, {'answer': '1998', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 18, 'start_character': 687, 'end_paragraph_id': 18, 'end_character': 691, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1990–2002: Wally Buono era.\n'}]}, {'answer': '1992', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 16, 'start_character': 357, 'end_paragraph_id': 16, 'end_character': 361, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1972–1989: Save Our Stamps.\n'}]}, {'answer': '1971', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 10, 'start_character': 254, 'end_paragraph_id': 10, 'end_character': 258, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1945–1959: The early years and an undefeated season.\n'}]}, {'answer': '1948', 'provenance': [{'wikipedia_id': '254169', 'title': 'Calgary Stampeders', 'start_paragraph_id': 9, 'start_character': 9, 'end_paragraph_id': 9, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1945–1959: The early years and an undefeated season.\n'}]}]