Premise: Conan O'Brien . He is best known for hosting several late-night talk shows ; since 2010 he has hosted Conan on the cable channel TBS . 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 . 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 .
Hypothesis: Conan O'Brien's has late-night programs.
Label: ENTAILMENT