Task: Question Answering
Input (English): passage: Nick Chinlund guest starred as condemned serial killer Matthew Brodus in the episode ``Execution''. Chinlund had originally auditioned to portray the role of Detective Elliot Stabler. John Ritter guest starred as Dr. Manning, a psychiatrist who becomes the prime suspect in his wife's murder, in the episode ``Monogamy''. Ritter was praised for his performance in the episode, which aired shortly before his death; Michael Buckley of TV Guide wrote that ``The gradual change in his demeanor makes for a memorable piece of acting.''
 question: was john ritter on law and order svu?
Output (English): Yes