Question: when did they get rid of the half penny
[{'answer': '1984', 'provenance': [{'wikipedia_id': '200125', 'title': 'Halfpenny (British decimal coin)', 'start_paragraph_id': 3, 'start_character': 543, 'end_paragraph_id': 3, 'end_character': 547, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]