Question: who played gary ewing's wife on knots landing
[{'answer': 'Joan Van Ark', 'provenance': [{'wikipedia_id': '7785094', 'title': 'Valene Ewing', 'start_paragraph_id': 1, 'start_character': 82, 'end_paragraph_id': 1, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7785094', 'title': 'Valene Ewing', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 956, 'bleu_score': 0.9231118111035581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6533468737546908892}, 'section': 'Section::::Abstract.'}]}]