With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Conan O'Brien hosts late-night programs.
text_B: Conan Christopher O'Brien -LRB- born April 18 , 1963 -RRB- is an American television host , comedian , and television producer .. Conan. Conan ( talk show ). He is best known for hosting several late-night talk shows ; since 2010 he has hosted Conan on the cable channel TBS .. Conan. Conan ( talk show ). TBS. TBS ( U.S. TV channel ). O'Brien was born in Brookline , Massachusetts , and was raised in an Irish Catholic family .. Irish Catholic. Irish Catholic. He served as president of The Harvard Lampoon while attending Harvard University , and was a writer for the sketch comedy series Not Necessarily the News .. sketch comedy. sketch comedy. Harvard University. Harvard University. The Harvard Lampoon. The Harvard Lampoon. Not Necessarily the News. Not Necessarily the News. After writing for several comedy shows in Los Angeles , he joined the writing staff of Saturday Night Live .. Saturday Night Live. Saturday Night Live. O'Brien was a writer and producer for The Simpsons for two seasons until he was commissioned by NBC to take over David Letterman 's position as host of Late Night in 1993 .. The Simpsons. The Simpsons. NBC. NBC. David Letterman. David Letterman. Late Night. Late Night with Conan O'Brien. A virtual unknown to the public , O'Brien 's initial Late Night tenure received unfavorable reviews and remained on a multiweek renewal cycle during its early years .. Late Night. Late Night with Conan O'Brien. The show generally improved over time and was highly regarded by the time of his departure in 2009 .. Afterwards , O'Brien relocated from New York to Los Angeles to host his own incarnation of The Tonight Show for seven months until network politics prompted a host change in 2010 .. The Tonight Show. The Tonight Show with Conan O'Brien. host change. 2010 Tonight Show conflict. Known for his spontaneous hosting style , which has been characterized as `` awkward , self-deprecating humor '' , O'Brien 's late-night programs combine the `` lewd and wacky with more elegant , narrative-driven short films -LRB- remotes -RRB- '' .. He has hosted Conan since 2010 and has also hosted such events as the Emmy Awards and Christmas in Washington .. Conan. Conan ( talk show ). Christmas in Washington. Christmas in Washington. O'Brien has been the subject of a documentary , Conan O'Brien Ca n't Stop -LRB- 2011 -RRB- , and has also hosted a 32-city live comedy tour .. Conan. Conan ( talk show ). live comedy tour. The Legally Prohibited from Being Funny on Television Tour. With the retirement of David Letterman on May 20 , 2015 , O'Brien became the longest-working of all current late-night talk show hosts in the United States , at 22 years .. late-night talk show. late-night talk show. David Letterman. David Letterman
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