Who is the all time leader in sack for the Steelers?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q191477', 'id': 0, 'label': 'Pittsburgh Steelers'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1067148', 'id': 1, 'label': 'Acrisure Stadium'}], 'links': [{'name_': 'P115', 'source': 0, 'target': 1, 'label': 'home venue'}, {'name_': 'P466', 'source': 1, 'target': 0, 'label': 'occupant'}]}