Question: For what NBC sketch comedy is the creator of 30 Rock best known?

Context paragraphs:
Candy Ford: Candy Ford (born May 1, 1975) is an American comedian and television actress, best known for starring in the sketch comedy, "The Rerun Show", Ford has also appeared in other TV programs including: "Curb Your Enthusiasm", "Will & Grace", and she provided voicework for the "Law & Order" videogame, and starred on the short-lived NBC sketch comedy, "The Rerun Show" and voiced Trixie in the film "The Country Bears" and later starred in "Girls Behaving Badly".

30 Rock (season 3): The third season of "30 Rock", an American television comedy series, consists of 22 episodes and began airing on October 30, 2008 on the NBC network in the United States.  The season was produced by Broadway Video, Little Stranger, and NBC Universal; the executive producers were series creator Tina Fey, Lorne Michaels, Marci Klein, David Miner, and Robert Carlock.

30 Rock Original Television Soundtrack: 30 Rock Original Television Soundtrack is the soundtrack for the award-winning NBC television program "30 Rock".  The two-disc album consists largely of songs composed by Jeff Richmond, the co-producer and musical director of the show and the husband of the creator, writer, producer, and star, Tina Fey.  It includes the score of the series as well as some songs that have been featured in the show's first four seasons.  It was released on November 16, 2010 by Relativity Music Group.  On November 20, 2010, the cast of "30 Rock" did their first ever signing for the soundtrack at the NBC Experience Store at Rockefeller Center.  Appearances were made by Tina Fey, Jeff Richmond, Jane Krakowski, Jack McBrayer, John Lutz, Kevin Brown, and Grizz Chapman.

30 Rock (season 5): The fifth season of "30 Rock", an American television comedy series on the NBC network in the United States, began airing on September 23, 2010.  NBC announced on March 5, 2010 that "30 Rock" would be returning for a fifth season in the 2010–2011 television season.  Beginning with episode 11, "30 Rock" was moved to the 10:00 PM timeslot, but, as a consolation, was renewed earlier than the other NBC sitcoms.  During this time, Tracy Morgan underwent an emergency operation, causing his character to be written out for several episodes.

30 Rock: 30 Rock is an American satirical television sitcom created by Tina Fey that ran on NBC from October 11, 2006, to January 31, 2013.  The series, loosely based on Fey's experiences as head writer for "Saturday Night Live", takes place behind the scenes of a fictional live sketch comedy show depicted as airing on NBC.  The series's name refers to 30 Rockefeller Plaza in New York City, the address of the Comcast Building, where the NBC Studios are located and where "Saturday Night Live" is written, produced, and performed.  This series is produced by Broadway Video and Little Stranger, Inc., in association with NBCUniversal.

Will Ferrell: John William Ferrell ( ; born July 16, 1967) is an American actor, comedian, producer, and writer.  He first established himself in the mid-1990s as a cast member on the NBC sketch comedy show "Saturday Night Live", and has subsequently starred in comedy films such as "" (2004), "" (2006), "Step Brothers" (2008), "The Other Guys" (2010) and "" (2013), all but one of which he co-wrote with his comedy partner Adam McKay.  The two also founded the comedy website Funny or Die in 2007.  Other films roles include "Elf", "Old School" (both 2003), "Blades of Glory" (2007), and the animated films "Megamind" (2010) and "The Lego Movie" (2014).

John Belushi: John Adam Belushi ( ; January 24, 1949 – March 5, 1982) was an American comedian, actor and musician.  Belushi is best known for his "intense energy and raucous attitude" which he displayed as one of the seven original cast members of the NBC sketch comedy show "Saturday Night Live" ("SNL").  Throughout his career, Belushi had a close personal and artistic partnership with his fellow "SNL" star Dan Aykroyd, whom he met while they were both working at Chicago's The Second City comedy club.

List of 30 Rock characters: "30 Rock" is an American television comedy series created by Tina Fey, which aired on NBC.  The series takes place behind the scenes of a fictional live sketch comedy series, also airing on NBC; the name "30 Rock" refers to the address of the GE Building, where NBC Studios is located (30 Rockefeller Plaza).  The series has an ensemble cast consisting of 14 regular cast members: Tina Fey, Alec Baldwin, Tracy Morgan, Jane Krakowski, Jack McBrayer, Scott Adsit, Judah Friedlander, Katrina Bowden, Keith Powell, Lonny Ross, John Lutz, Kevin Brown, Grizz Chapman, and Maulik Pancholy.

Pamela Norris: Pamela Norris in an American screenwriter and producer.  She is best known for her work on the NBC sketch comedy series "Saturday Night Live" (1980–84), and for co-writing the screenplay of the 1989 film "Troop Beverly Hills".  She was executive producer of the sitcom "Designing Women". , and "The Huntress" on USA Network.

Tina Fey: Elizabeth Stamatina "Tina" Fey ( ; born May 18, 1970) is an American actress, comedian, writer, and producer.  She is best known for her work on the NBC sketch comedy series "Saturday Night Live" (1997–2006) and for creating the acclaimed comedy series "30 Rock" (2006–2013) and "Unbreakable Kimmy Schmidt" (2015–present).  Fey is also known for her film work, with her most notable appearances including roles in "Baby Mama" (2008), "Date Night" (2010), "Muppets Most Wanted" (2014), "Sisters" (2015), and "Whiskey Tango Foxtrot" (2016).

Supporting paragraphs: 30 Rock (season 3) Tina Fey
Answer: "Saturday Night Live"