Question: who shot dexter's sister in season 4
[{'answer': 'Christine Hill', 'provenance': [{'wikipedia_id': '26584533', 'title': 'Arthur Mitchell (Dexter)', 'start_paragraph_id': 9, 'start_character': 142, 'end_paragraph_id': 9, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Character overview.:Family.\n'}]}, {'provenance': [{'wikipedia_id': '26584533', 'title': 'Arthur Mitchell (Dexter)', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 731, 'bleu_score': 0.9634959513272161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17835478339853582726}, 'section': 'Section::::Character overview.:Family.\n'}]}]