Question: who plays tony dinozzo's father on ncis
[{'answer': 'Robert John Wagner , Jr.'}, {'provenance': [{'wikipedia_id': '478023', 'title': 'Robert Wagner', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 393, 'bleu_score': 0.79277284375054, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1995271749040556450}, 'section': 'Section::::Abstract.'}]}]