Question: who played daryl's brother on the walking dead
[{'answer': 'Michael Rooker', 'provenance': [{'wikipedia_id': '37571771', 'title': 'Merle Dixon', 'start_paragraph_id': 1, 'start_character': 204, 'end_paragraph_id': 1, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37571771', 'title': 'Merle Dixon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 751, 'bleu_score': 0.9839344367380701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2123439391053139931}, 'section': 'Section::::Abstract.'}]}]