Question: when did the round pound come into circulation
[{'answer': '1984', 'provenance': [{'wikipedia_id': '200442', 'title': 'One pound (British coin)', 'start_paragraph_id': 2, 'start_character': 106, 'end_paragraph_id': 2, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '200442', 'title': 'One pound (British coin)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 826, 'bleu_score': 0.9366124684837951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2563100670654312129}, 'section': 'Section::::Abstract.'}]}]