Question: who played the nurse on marcus welby md
[{'answer': 'Elena Verdugo', 'provenance': [{'wikipedia_id': '843942', 'title': 'Marcus Welby, M.D.', 'start_paragraph_id': 1, 'start_character': 434, 'end_paragraph_id': 1, 'end_character': 447, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '843942', 'title': 'Marcus Welby, M.D.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 710, 'bleu_score': 0.941049221415391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17530046183412361129}, 'section': 'Section::::Abstract.'}]}]