Question: when was by the waters of babylon written
[{'answer': 'July 31 , 1937', 'provenance': [{'wikipedia_id': '7523902', 'title': 'By the Waters of Babylon', 'start_paragraph_id': 1, 'start_character': 119, 'end_paragraph_id': 1, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7523902', 'title': 'By the Waters of Babylon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 325, 'bleu_score': 0.9210921090251241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6064855317587453760}, 'section': 'Section::::Abstract.'}]}]