Question: who plays the grandpa on man with a plan
[{'answer': 'Stacy Keach', 'provenance': [{'wikipedia_id': '50548163', 'title': 'Man with a Plan (TV series)', 'start_paragraph_id': 16, 'start_character': 12, 'end_paragraph_id': 16, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Main.\n'}]}]