Question: when did the royal navy stop issuing rum
[{'answer': '31 July 1970 )', 'provenance': [{'wikipedia_id': '31825441', 'title': 'Black Tot Day', 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31825441', 'title': 'Black Tot Day', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 0.7083116115647751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8278604420724424516}, 'section': 'Section::::Abstract.'}]}]