Question: what does c mean in track and field
[{'answer': 'converted times', 'provenance': [{'wikipedia_id': '40638109', 'title': 'Athletics abbreviations', 'start_paragraph_id': 5, 'start_character': 1369, 'end_paragraph_id': 5, 'end_character': 1384, 'bleu_score': 1.0, 'section': 'Section::::Times and marks.\n'}]}, {'provenance': [{'wikipedia_id': '40638109', 'title': 'Athletics abbreviations', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1384, 'bleu_score': 0.991360488753344, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9495692919239816841}, 'section': 'Section::::Times and marks.\n'}]}]