Question: who is the actor that plays clay on sons of anarchy
[{'answer': 'Ronald N. Perlman'}, {'provenance': [{'wikipedia_id': '854532', 'title': 'Ron Perlman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 0.689455234907131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1384291347709816073}, 'section': 'Section::::Abstract.'}]}]