Question: when did south africa change from pounds to rands
[{'answer': '1961', 'provenance': [{'wikipedia_id': '3329634', 'title': 'South African pound', 'start_paragraph_id': 1, 'start_character': 162, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3329634', 'title': 'South African pound', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1342771966638487902}, 'section': 'Section::::Abstract.'}]}]