Question: when was the lion witch and wardrobe written
[{'answer': 'end of March 1949', 'provenance': [{'wikipedia_id': '242130', 'title': 'The Lion, the Witch and the Wardrobe', 'start_paragraph_id': 38, 'start_character': 316, 'end_paragraph_id': 38, 'end_character': 333, 'bleu_score': 1.0, 'section': 'Section::::Writing.\n'}]}, {'provenance': [{'wikipedia_id': '242130', 'title': 'The Lion, the Witch and the Wardrobe', 'start_paragraph_id': 38, 'start_character': 0, 'end_paragraph_id': 38, 'end_character': 584, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11424636853573724229}, 'section': 'Section::::Writing.\n'}]}]