Question: who plays steve's wife on my three sons
[{'answer': 'Beverly Garland', 'provenance': [{'wikipedia_id': '174002', 'title': 'My Three Sons', 'start_paragraph_id': 14, 'start_character': 107, 'end_paragraph_id': 14, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::History.:CBS years.\n'}]}, {'provenance': [{'wikipedia_id': '174002', 'title': 'My Three Sons', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 1098, 'bleu_score': 0.9399884888986321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2975621253828932720}, 'section': 'Section::::History.:CBS years.\n'}]}, {'provenance': [{'wikipedia_id': '174002', 'title': 'My Three Sons', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2975621253828932720}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '174002', 'title': 'My Three Sons', 'section': 'Section::::History.:CBS years.\n', 'start_paragraph_id': 14, 'end_paragraph_id': 14, 'meta': {'evidence_span': ['widowed teacher Barbara Harper (Beverly Garland) as his wife', 'Steve remarries, taking widowed teacher Barbara Harper (Beverly Garland) as his wife', 'Beverly Garland']}}]}]