Question: when did ray bradbury wrote his first book
[{'answer': '1949', 'provenance': [{'wikipedia_id': '26181', 'title': 'Ray Bradbury', 'start_paragraph_id': 67, 'start_character': 3, 'end_paragraph_id': 67, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Bibliography.:First novel.\n'}]}, {'provenance': [{'wikipedia_id': '26181', 'title': 'Ray Bradbury', 'start_paragraph_id': 67, 'start_character': 0, 'end_paragraph_id': 67, 'end_character': 990, 'bleu_score': 0.988919240064389, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1928254563900646898}, 'section': 'Section::::Bibliography.:First novel.\n'}]}]