Question: who played ben stone son on law and order
[{'answer': 'Michael Moriarty', 'provenance': [{'wikipedia_id': '1840876', 'title': 'Benjamin Stone (Law & Order character)', 'start_paragraph_id': 1, 'start_character': 59, 'end_paragraph_id': 1, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1840876', 'title': 'Benjamin Stone (Law & Order character)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3765651771969962529}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1840876', 'title': 'Benjamin Stone (Law & Order character)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 251, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3765651771969962529}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1865101', 'title': 'Jack McCoy', 'section': 'Section::::Character overview.\n', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['Jack McCoy brings 24 years of experience with him as he is appointed Executive Assistant District Attorney by Adam Schiff (Steven Hill) in the season five premiere episode "Second Opinion". He quickly establishes himself as a more unconventional, ruthless litigator than his predecessor, Ben Stone (Michael Moriarty). He often bendsand sometimes breakstrial rules to get convictions, finds tenuous rationales for charging defendants with crimes when the original charges fail to stick, and charges innocent people to frighten them into testifying against others. McCoy is found in contempt of court 80 times for such behavior, and his tactics occasionally incur negative publicity for the DA\'s office. His underlying motivation, however, is not, he maintains, corruption, but a sincere desire to see justice done. To that end, McCoy has gone after defendants accused of perverting the justice system to arrange wrongful convictions with just as much determination as his more mundane cases. Such aggressive actions in the courts have earned him the nickname "Hang \'em High McCoy". He has subsequently developed a reputation with both colleagues and rival attorneys, once being referred to as "the top of the legal food chain" by a rival attorney during a trial.', 'He quickly establishes himself as a more unconventional, ruthless litigator than his predecessor, Ben Stone (Michael Moriarty).']}}]}, {'provenance': [{'wikipedia_id': '1840876', 'title': 'Benjamin Stone (Law & Order character)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Benjamin "Ben" Stone is a fictional character portrayed by Michael Moriarty in the TV drama "Law & Order"', 'Benjamin "Ben" Stone is a fictional character portrayed by Michael Moriarty in the TV drama "Law & Order". He was the Executive Assistant District Attorney for New York County until his resignation at the end of season four. He appeared in 88 episodes.', 'Benjamin "Ben" Stone is a fictional character portrayed by Michael Moriarty in the TV drama "Law & Order"']}}]}]