Question: who played john clark sr on nypd blue
[{'answer': 'Joe Spano', 'provenance': [{'wikipedia_id': '8004616', 'title': 'List of NYPD Blue characters', 'start_paragraph_id': 75, 'start_character': 1339, 'end_paragraph_id': 75, 'end_character': 1348, 'bleu_score': 1.0, 'section': 'Section::::Other police.\n'}]}, {'provenance': [{'wikipedia_id': '8004616', 'title': 'List of NYPD Blue characters', 'start_paragraph_id': 75, 'start_character': 0, 'end_paragraph_id': 75, 'end_character': 1348, 'bleu_score': 0.9919515466802871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10231807590977832646}, 'section': 'Section::::Other police.\n'}]}, {'provenance': [{'wikipedia_id': '8004616', 'title': 'List of NYPD Blue characters', 'section': 'Section::::Other police.\n', 'start_paragraph_id': 75, 'end_paragraph_id': 75, 'meta': {'evidence_span': ['BULLET::::- Det. John Clark Sr. John Clark Jr.\'s father. An average detective from a low crime precinct mutually despised by Sipowicz, who called him "Dutch Boy" in reference to a plaster marketing statue he once shot in the dark thinking it was a suspect with a gun. He threw his son out of the house when John Jr. decided to work at the 15th with And', 'BULLET::::- Det. John Clark Sr. John Clark Jr.\'s father. An average detective from a low crime precinct mutually despised by Sipowicz, who called him "Dutch Boy" in reference to a plaster marketing statue he once shot in the dark thinking it was a suspect with a gun. He threw his son out of the house when John Jr. decided to work at the 15th with Andy; his partner and he later worked a case with Clark Jr. and Andy that revealed Clark Sr.\'s by-the-book approach and hyper-sensitivity to his son being anything like Andy. (In fact, Andy was much more the kind of detective Clark Jr. wanted to be, which is why he chose to transfer to the 15th when he earned a detective\'s shield and pick of assignments.) Clark Sr. later got busted for sleeping with a prostitute and let his son face the IAB accusation and potential discipline until Andy told him Clark Jr. was on the verge of being fired, which caused Clark Sr. to confess. After this, Clark Sr. began drinking heavily and became an IAB informant, which nearly ruined John\'s career at the 15th. His actions helped lead to the campaign by Officer Laughlin against Clark Jr., who finally told his father to stop making bad decisions on his behalf and stop drinking so much. A depressed Clark Sr. later committed suicide, which sent his son into a long depression of his own. Played by Joe Spano.', 'A depressed Clark Sr. later committed suicide, which sent his son into a long depression of his own. Played by Joe Spano.']}}]}]