Question: what does cj on a license plate mean
[{'answer': 'Commercial', 'provenance': [{'wikipedia_id': '16796432', 'title': 'Vehicle registration plates of Arizona', 'start_paragraph_id': 2, 'start_character': 57, 'end_paragraph_id': 2, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]