Question: who plays dr hart in hart of dixie
[{'answer': 'Rachel Bilson', 'provenance': [{'wikipedia_id': '31810499', 'title': 'Hart of Dixie', 'start_paragraph_id': 1, 'start_character': 169, 'end_paragraph_id': 1, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31810499', 'title': 'Hart of Dixie', 'start_paragraph_id': 15, 'start_character': 12, 'end_paragraph_id': 15, 'end_character': 1634, 'bleu_score': 0.9711242164900721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12793128639026988623}, 'section': 'Section::::Cast and characters.\n'}]}]