Question: when did the first 45 record come out
[{'answer': 'February 1949', 'provenance': [{'wikipedia_id': '172121', 'title': 'Phonograph record', 'start_paragraph_id': 61, 'start_character': 54, 'end_paragraph_id': 61, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::New sizes and materials.\n'}]}, {'provenance': [{'wikipedia_id': '172121', 'title': 'Phonograph record', 'start_paragraph_id': 61, 'start_character': 0, 'end_paragraph_id': 61, 'end_character': 667, 'bleu_score': 0.9831208473513011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17539248885616953136}, 'section': 'Section::::New sizes and materials.\n'}]}]