Question: who played bobby ewing's wife on dallas
[{'answer': 'Victoria Principal', 'provenance': [{'wikipedia_id': '7422946', 'title': 'Pam Ewing', 'start_paragraph_id': 1, 'start_character': 131, 'end_paragraph_id': 1, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7422946', 'title': 'Pam Ewing', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1111, 'bleu_score': 0.9019910438395631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9719167430678593504}, 'section': 'Section::::Abstract.'}]}]