Question: who played ralph furley on three's company
[{'answer': 'Don Knotts', 'provenance': [{'wikipedia_id': '47186978', 'title': "List of Three's Company characters", 'start_paragraph_id': 64, 'start_character': 30, 'end_paragraph_id': 64, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Ralph Furley.\n'}]}, {'provenance': [{'wikipedia_id': '47186978', 'title': "List of Three's Company characters", 'start_paragraph_id': 64, 'start_character': 0, 'end_paragraph_id': 64, 'end_character': 40, 'bleu_score': 0.725979529115477, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12683506994208169812}, 'section': 'Section::::Ralph Furley.\n'}]}]