Question: what does the d stand for in old money
[{'answer': 'denarius', 'provenance': [{'wikipedia_id': '25339887', 'title': 'Penny (British pre-decimal coin)', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25339887', 'title': 'Penny (British pre-decimal coin)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 370, 'bleu_score': 0.895030808771145, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6930260575817030648}, 'section': 'Section::::Abstract.'}]}]