Question: who played angela's mother on who's the boss
[{'answer': 'Katherine Helmond', 'provenance': [{'wikipedia_id': '371185', 'title': "Who's the Boss?", 'start_paragraph_id': 1, 'start_character': 586, 'end_paragraph_id': 1, 'end_character': 603, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]