Question: when does tinker tailor soldier spy take place
[{'answer': '1973', 'provenance': [{'wikipedia_id': '638069', 'title': 'Tinker Tailor Soldier Spy', 'start_paragraph_id': 9, 'start_character': 6, 'end_paragraph_id': 9, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '638069', 'title': 'Tinker Tailor Soldier Spy', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 911, 'bleu_score': 0.64635562662375, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7359404328580192236}, 'section': 'Section::::Plot.\n'}]}]