Question: who was the original voice of fred flintstone
[{'answer': 'Jackie Gleason', 'provenance': [{'wikipedia_id': '51787', 'title': 'The Flintstones', 'start_paragraph_id': 28, 'start_character': 89, 'end_paragraph_id': 28, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::Voice actors.\n'}]}, {'provenance': [{'wikipedia_id': '51787', 'title': 'The Flintstones', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 962, 'bleu_score': 0.9874601949752461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4914270146909150914}, 'section': 'Section::::Voice actors.\n'}]}]