Question: when did the cowboys win their first super bowl
[{'answer': 'January 16 , 1972', 'provenance': [{'wikipedia_id': '29132', 'title': 'Super Bowl VI', 'start_paragraph_id': 1, 'start_character': 367, 'end_paragraph_id': 1, 'end_character': 384, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29132', 'title': 'Super Bowl VI', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 638, 'bleu_score': 0.8839852620566131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1231445655979557431}, 'section': 'Section::::Abstract.'}]}]