Question: what does the c mean in the nfl
[{'answer': 'captain', 'provenance': [{'wikipedia_id': '19850127', 'title': 'National Football League team captains', 'start_paragraph_id': 0, 'start_character': 30, 'end_paragraph_id': 0, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19850127', 'title': 'National Football League team captains', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 821, 'bleu_score': 0.9863473221773311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8258703939838400110}, 'section': 'Section::::Abstract.'}]}]