Question: what treaty set up the league of nations
[{'answer': 'Treaty of Versailles', 'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 21, 'start_character': 497, 'end_paragraph_id': 21, 'end_character': 517, 'bleu_score': 1.0, 'section': 'Section::::Origins.:Establishment.\n'}]}, {'provenance': [{'wikipedia_id': '17926', 'title': 'League of Nations', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 685, 'bleu_score': 0.9229371361700901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13183963046046004361}, 'section': 'Section::::Origins.:Establishment.\n'}]}]