Question: who plays brian finch's father on limitless
[{'answer': 'Ron Rifkin', 'provenance': [{'wikipedia_id': '47202753', 'title': 'Limitless (TV series)', 'start_paragraph_id': 15, 'start_character': 12, 'end_paragraph_id': 15, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Recurring.\n'}]}, {'provenance': [{'wikipedia_id': '47202753', 'title': 'Limitless (TV series)', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 54, 'bleu_score': 0.7598356856515921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8432575511532954007}, 'section': 'Section::::Cast.:Recurring.\n'}]}]