Question: what does md on a license plate mean
[{'answer': 'Moldova', 'provenance': [{'wikipedia_id': '15000888', 'title': 'Vehicle registration plates of Moldova', 'start_paragraph_id': 0, 'start_character': 31, 'end_paragraph_id': 0, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15000888', 'title': 'Vehicle registration plates of Moldova', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 551, 'bleu_score': 0.979484453366057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14083755267623715595}, 'section': 'Section::::Abstract.'}]}]