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

Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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). [END]  
Answer: "Saturday Night Live"
"Saturday Night Live"