Question: who plays larry david's dad in curb your enthusiasm
[{'answer': 'Nat David', 'provenance': [{'wikipedia_id': '24914794', 'title': 'List of Curb Your Enthusiasm recurring roles', 'start_paragraph_id': 9, 'start_character': 11, 'end_paragraph_id': 9, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Frequently recurring characters.:Sammi Greene.\n'}]}, {'provenance': [{'wikipedia_id': '24914794', 'title': 'List of Curb Your Enthusiasm recurring roles', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 442, 'bleu_score': 0.9257921357402691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 961623804799084770}, 'section': 'Section::::Frequently recurring characters.:Nat David.\n'}]}]