Question: when did germany joined the league of nations
[{'answer': 'September 1926 ;', 'provenance': [{'wikipedia_id': '614945', 'title': 'Member states of the League of Nations', 'start_paragraph_id': 47, 'start_character': 22, 'end_paragraph_id': 47, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::1926.\n'}]}, {'provenance': [{'wikipedia_id': '614945', 'title': 'Member states of the League of Nations', 'start_paragraph_id': 47, 'start_character': 0, 'end_paragraph_id': 47, 'end_character': 62, 'bleu_score': 0.559368491593307, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12056772830779507214}, 'section': 'Section::::1926.\n'}]}]