Question: when did threepenny bits go out of circulation
[{'answer': '1967', 'provenance': [{'wikipedia_id': '221261', 'title': 'Threepence (British coin)', 'start_paragraph_id': 39, 'start_character': 361, 'end_paragraph_id': 39, 'end_character': 365, 'bleu_score': 1.0, 'section': 'Section::::Elizabeth II threepences.\n'}]}, {'provenance': [{'wikipedia_id': '221261', 'title': 'Threepence (British coin)', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 398, 'bleu_score': 0.7357902238513151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6818454786322961039}, 'section': 'Section::::Elizabeth II threepences.\n'}]}]