Question: who plays dr. hart on hart of dixie
[{'answer': 'Rachel Sarah Bilson'}, {'provenance': [{'wikipedia_id': '20647283', 'title': 'Rachel Bilson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 427, 'bleu_score': 0.9188480019270161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4175770176003431084}, 'section': 'Section::::Abstract.'}]}]