Question: Patrick Joseph Buchanan (; born November 2, 1938) is an American paleoconservative political commentator, author, syndicated columnist, politician, and broadcaster. Buchanan was a senior advisor to U.S. Presidents Richard Nixon, Gerald Ford, and Ronald Reagan, and was an original host on CNN's Crossfire. He sought the Republican presidential nomination in 1992 and 1996. He ran on the Reform Party ticket in the 2000 presidential election.

Buchanan wrote that it was impossible for 850,000 Jews to be killed by diesel exhaust fed into the gas chamber at Treblinka in a column for the New York Post in 1990. Buchanan once argued Treblinka "was not a death camp but a transit camp used as a 'pass-through point' for prisoners". In fact, some 900,000 Jews had died at Treblinka. When George Will challenged him about it on TV, Buchanan did not reply. In 1991 William F. Buckley, Jr. wrote a 40,000-word National Review article discussing anti-Semitism among conservative commentators focused largely on Buchanan; the article and many responses to it were collected in the book In Search of Anti-Semitism (1992). He concluded: "I find it impossible to defend Pat Buchanan against the charge that what he did and said during the period under examination amounted to anti-Semitism."  The Anti-Defamation League has called Buchanan an "unrepentant bigot" who "repeatedly demonizes Jews and minorities and openly affiliates with white supremacists." "There's no doubt," said Pulitzer Prize-winning columnist Charles Krauthammer, "he makes subliminal appeals to prejudice." Buchanan denies that he is antisemitic, and a number of his journalistic colleagues, including Murray Rothbard, Justin Raimondo, Jack Germond, Al Hunt and Mark Shields, have defended him against the charge. As a member of the Reagan White House, he is accused of having suppressed the Reagan Justice Department's investigation into Nazi scientists brought to America by the OSS's Operation Paperclip. In the context of the Gulf War, on September 15, 1990, Buchanan appeared on The McLaughlin Group and said that "there are only two groups that are beating the drums for war in the Middle East - the Israeli defense ministry and its 'amen corner' in the United States." He also said: "The Israelis want this war desperately because they want the United States to destroy the Iraqi war machine. They want us to finish them off. They don't care about our relations with the Arab world." Furthermore, on The McLaughlin Group Buchanan has also made such comments as "'Capitol Hill is Israeli occupied territory' and 'If you want to know ethnicity and power in the United States Senate, 13 members of the Senate are Jewish folks who are from 2 percent of the population. That is where real power is at...'"  Buchanan supported President Reagan's plan to visit a German military cemetery at Bitburg in 1985, where among buried Wehrmacht soldiers were the graves of 48 Waffen SS members. At the insistence of German Chancellor Helmut Kohl and over the vocal objections of Jewish groups, the trip went through.  In an interview, author Elie Wiesel described attending a White House meeting of Jewish leaders about the trip: "The only one really defending the trip was Pat Buchanan, saying, 'We cannot give the perception of the President being subjected to Jewish pressure.'"  Buchanan accused Wiesel of fabricating the story in an ABC interview in 1992: "I didn't say it and Elie Wiesel wasn't even in the meeting [...] That meeting was held three weeks before the Bitburg summit was held. If I had said that, it would have been out of there within hours and on the news".

Using a quote from the above article, answer the following question: When did he deny the holocaust happened?
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Problem: "Trapped in the Closet" is the twelfth episode in the ninth season of the American animated television series South Park. The 137th episode of the series overall, it originally aired on Comedy Central in the United States on November 16, 2005. In the episode, Stan joins Scientology in an attempt to find something "fun and free". After the discovery of his surprisingly high "thetan levels", he is recognized as the reincarnation of L. Ron Hubbard, the founder of the church.

Saving for a bicycle and not wanting to spend money on entertainment, Stan takes a free "personality test" being offered by Scientologists on the street. After answering a long questionnaire, Stan is informed that he is extremely depressed and therefore a perfect candidate for Scientology. They offer to help him out for $240. Back home, Stan asks his parents for the money. His father suggests that he use the money he had been saving. Stan pays and is taken into an auditing room where an attendant reads his "thetan levels" using an "E-meter". Stan has such a high reading that the Scientology headquarters in Los Angeles is notified. There, the president of Scientology determines that, because his reading is so high, Stan must be a reincarnation of L. Ron Hubbard, Scientology's founder and prophet.  Later that night, a large group of Scientologists, including John Travolta, gather outside the Marsh house to celebrate Hubbard's "second coming". The president of Scientology arrives in a helicopter and talks with Stan's parents. They are opposed to Stan's participation, but the president informs them that "we're not asking him to join us; we're asking him to lead us". Randy sends Stan to his room, where he finds Tom Cruise waiting. Cruise, believing that Stan is genuinely Hubbard's reincarnation, asks him whether he has enjoyed his acting. When "Hubbard" replies that his acting is okay but not as good as others' such as Leonardo DiCaprio or the Napoleon Dynamite guy, Tom hears that he is "a failure in the eyes of the prophet" and locks himself in Stan's closet. He refuses to come out, despite the entreaties of Randy, Nicole Kidman, the police, Travolta and R. Kelly to "come out of the closet". Travolta and Kelly eventually join Cruise in the closet.  Downstairs, the church president tries to convince Stan's parents to allow their son to participate. He tells to Stan the great secret behind the church -- a condensed version of the story of Xenu, based directly on the Scientology Operating Thetan III document, and accompanied by an onscreen caption reading "This is what Scientologists actually believe". He then begs Stan to continue writing where "L. Ron" left off. Stan, impressed by the story, does so. He shows his writings to the Scientology president, who initially approves of the work, but when Stan says "to really be a church, you can't charge money to help", the president reveals to Stan that the church is in reality a global money-making scam. He asks that Stan continue with that in mind. Stan appears to agree and keeps writing.  Outside the house, the president introduces Stan to his followers, to whom he will read parts of his new doctrine. However, instead of presenting it to them, Stan states that he is not the reincarnation of L. Ron Hubbard, and that "Scientology is just a big fat global scam". The Scientologists grow angry and threaten to sue him. The celebrities in the closet appear, threatening to sue Stan as well. The last shot is Stan daring them to do so. However, that shot is followed immediately by the closing credits naming only "John Smith" and "Jane Smith", a reference to Tom Cruise and the Church of Scientology's reputation for litigiousness.

How does the episode begin?

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