Cliff Claven is a character played by John Ratzenbeger on the long cancelled TV show called Cheers. There were Jeopardy questions asked about John Ratzenbeger on shows that aired on these three dates 5 10 2005, 6 10 2004, & 1 19 2000. He was not on Jeopardy except maybe in the filming of the TV show Cheers.
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