Question: when did compulsory national service end in uk
[{'answer': '31 December 1960', 'provenance': [{'wikipedia_id': '15180157', 'title': 'Conscription in the United Kingdom', 'start_paragraph_id': 25, 'start_character': 299, 'end_paragraph_id': 25, 'end_character': 315, 'bleu_score': 1.0, 'section': 'Section::::After 1945.\n'}]}, {'provenance': [{'wikipedia_id': '15180157', 'title': 'Conscription in the United Kingdom', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 383, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18280525242535950514}, 'section': 'Section::::After 1945.\n'}]}]