Question: who played grace gardner on hill street blues
[{'answer': 'Barbara Babcock', 'provenance': [{'wikipedia_id': '2262082', 'title': 'Barbara Babcock', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2262082', 'title': 'Barbara Babcock', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 356, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1374064706312005724}, 'section': 'Section::::Abstract.'}]}]