Question: when did germany become a member of the league of nations
[{'answer': '1926', 'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 36, 'start_character': 169, 'end_paragraph_id': 36, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Principal organs.\n'}]}, {'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 684, 'bleu_score': 0.939516250852901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6835051839480987046}, 'section': 'Section::::Principal organs.\n'}]}]