Question: when did the royal mint move to wales
[{'answer': 'the 1960s', 'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 1, 'start_character': 1006, 'end_paragraph_id': 1, 'end_character': 1015, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the 1960s .', 'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 1, 'start_character': 1006, 'end_paragraph_id': 1, 'end_character': 1019, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1968', 'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 41, 'start_character': 181, 'end_paragraph_id': 41, 'end_character': 185, 'bleu_score': 1.0, 'section': 'Section::::History.:1967 to present.:Move to Wales.\n'}]}, {'answer': '17 December 1968', 'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 41, 'start_character': 169, 'end_paragraph_id': 41, 'end_character': 185, 'bleu_score': 1.0, 'section': 'Section::::History.:1967 to present.:Move to Wales.\n'}]}, {'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1180, 'bleu_score': 0.9639829783986981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11644519860977222179}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 1244, 'bleu_score': 0.9906757361591391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11644519860977222179}, 'section': 'Section::::History.:1967 to present.:Move to Wales.\n'}]}, {'provenance': [{'wikipedia_id': '274396', 'title': 'Royal Mint', 'section': 'Section::::History.:1967 to present.:Move to Wales.\n', 'start_paragraph_id': 41, 'end_paragraph_id': 41, 'meta': {'evidence_span': ['Work on the new mint began in August 1967 with the construction of a blank treatment plant and plant for striking. This first phase of the mint was officially opened on 17 December 1968 by the royal attendance of Queen Elizabeth II, Prince Philip and their son Prince Charles.', 'Work on the new mint began in August 1967 with the construction of a blank treatment plant and plant for striking. This first phase of the mint was officially opened on 17 December 1968 by the royal attendance of Queen Elizabeth II, Prince Philip and their son Prince Charles. Originally there were fears that the Royal family would face protests because of the Investiture of Prince Charles as the Prince of Wales; however, such protests failed to materialise', 'This first phase of the mint was officially opened on 17 December 1968']}}]}]