Question: what does d stand for in old currency
[{'answer': 'denarii', 'provenance': [{'wikipedia_id': '521616', 'title': '£sd', 'start_paragraph_id': 1, 'start_character': 402, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '521616', 'title': '£sd', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 580, 'bleu_score': 0.819295497352402, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5503225342496469755}, 'section': 'Section::::Abstract.'}]}]