Question: what does d.c. mean after a doctors name
[{'answer': 'Doctor of Chiropractic', 'provenance': [{'wikipedia_id': '24693288', 'title': 'List of chiropractic credentials', 'start_paragraph_id': 1, 'start_character': 24, 'end_paragraph_id': 1, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24693288', 'title': 'List of chiropractic credentials', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 412, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10165720871851711102}, 'section': 'Section::::Abstract.'}]}]