Question: when did japan leave the league of nations
[{'answer': '1933', 'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 85, 'start_character': 983, 'end_paragraph_id': 85, 'end_character': 987, 'bleu_score': 1.0, 'section': 'Section::::Resolving territorial disputes.:Colombia and Peru.\n'}]}, {'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 97, 'start_character': 0, 'end_paragraph_id': 97, 'end_character': 415, 'bleu_score': 0.8836881875380561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 267430994221516038}, 'section': 'Section::::Other conflicts.:Mukden Incident: Japan attacks China.\n'}]}]