Question: when did casper the friendly ghost come out
[{'answer': '1945', 'provenance': [{'wikipedia_id': '21132349', 'title': 'Casper the Friendly Ghost', 'start_paragraph_id': 5, 'start_character': 90, 'end_paragraph_id': 5, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::History.:Creation and success at Paramount.\n'}]}, {'provenance': [{'wikipedia_id': '21132349', 'title': 'Casper the Friendly Ghost', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1371, 'bleu_score': 0.9699440532953961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 626633893941671869}, 'section': 'Section::::History.:Creation and success at Paramount.\n'}]}]