Question: how many super bowls have the cowboys won and what were the years
[{'answer': '5', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 1, 'start_character': 1302, 'end_paragraph_id': 1, 'end_character': 1303, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1971', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 9, 'start_character': 193, 'end_paragraph_id': 9, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::History.:1970s.\n'}]}, {'answer': '1977', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 9, 'start_character': 202, 'end_paragraph_id': 9, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::History.:1970s.\n'}]}, {'answer': '1992', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 18, 'start_character': 280, 'end_paragraph_id': 18, 'end_character': 284, 'bleu_score': 1.0, 'section': 'Section::::History.:1990s.\n'}]}, {'answer': '1993', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 21, 'start_character': 491, 'end_paragraph_id': 21, 'end_character': 495, 'bleu_score': 1.0, 'section': 'Section::::History.:1990s.\n'}]}, {'answer': '1995', 'provenance': [{'wikipedia_id': '8121', 'title': 'Dallas Cowboys', 'start_paragraph_id': 24, 'start_character': 22, 'end_paragraph_id': 24, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::History.:1990s.\n'}]}]