Question: when did the halfpenny go out of circulation in ireland
[{'answer': '1987', 'provenance': [{'wikipedia_id': '1678853', 'title': 'Halfpenny (Irish decimal coin)', 'start_paragraph_id': 1, 'start_character': 444, 'end_paragraph_id': 1, 'end_character': 448, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]