Question: The star of the Fox sitcom "The Mick" began her career in what improvisational group?

Context paragraphs:
Bar Kokhba Sextet: Bar Kokhba Sextet brings together six core members of the Masada family under the leadership of John Zorn.  The music act is an improvisational group from New York's best downtown artists, including Cyro Baptista on percussion, Marc Ribot on guitar, Greg Cohen on bass, Joey Baron on drums and Mark Feldman / Erik Friedlander on strings.  According to Tzadik, John Zorn's music label, the band's music is "Sephardic exotica for young moderns".

Lee Simpson: Lee Simpson is a British actor and comedian best known as a member of the improvisational group The Comedy Store Players.

Chris Sheridan (writer): Christopher "Chris" Sheridan (born September 19, 1967) is an American television writer, producer, and occasional voice actor.  Born in the Philippines, Sheridan grew up in New Hampshire.  He attended Gilford High School, where he decided that he wanted to become a writer.  After graduating from Union College, he moved back to his home, where he worked at several short-term jobs before relocating to California to start his career.  His first job came in 1992 when he was hired as a writer's assistant for the Fox sitcom "Shaky Ground".  Following that, he was hired as an assistant on "Living Single", a Fox sitcom, where he was eventually promoted to writer.  He stayed with the show until its cancellation in 1998.

Tichina Arnold: Tichina Rolanda Arnold (born June 28, 1969) is an American actress, comedian, model and singer.  She began her career as a child actor, appearing in supporting roles in "Little Shop of Horrors" (1986) and "How I Got into College" (1989) before being cast as Pamela James on the FOX sitcom "Martin", which she played from 1992 to the series' conclusion in 1997.  She also played the family matriarch Rochelle on the UPN/CW sitcom "Everybody Hates Chris" from 2005 to 2009, and portrayed Judi Mann in the TV Land original sitcom "Happily Divorced" from 2011 to 2013.  Beginning 2014, she has played the lead role of Cassie Calloway on "Survivor's Remorse".

Musica Elettronica Viva: Musica Elettronica Viva (MEV) is a live acoustic/electronic improvisational group formed in Rome, Italy, in 1966.  Over the years, its members have included Alvin Curran, Richard Teitelbaum, Frederic Rzewski, Allan Bryant, Carol Plantamura, Ivan Vandor, Steve Lacy, and Jon Phetteplace.

Paul Christie (voice actor): Paul Anthony Christie (born 1951) is an American voice actor.  He was born and raised in Manhattan.  Over his long career Paul has worked as an artist, writer, narrator, and comedian, as well as an voice actor.  In the 70's Paul was a contributing editor for Crawdaddy magazine.  In the 1980s he performed stand up in and around New York and was a founding member of the improvisational group The House Band.  His graphic artwork was well known in New York through Kid Christie, the company he co-founded with Theresa Fiorentino.  As a writer Paul co-wrote the albums "Midnight at the Lost and Found", and "Blind before I Stop" for the rock star Meatloaf.  He is probably best known over the past 35 years as a voice artist.  Over his career Paul has done thousands of commercials for clients including Chrysler, Dominoes, Pontiac, Canon, Calvin Klein and Budweiser.  His award winning role as "Louie the Lizard" for Budweiser, became an advertising legend.

Don Dietrich (musician): Don Dietrich is a saxophonist and founding member of New York City based improvisational group, Borbetomagus.

Kaitlin Olson: Kaitlin Willow Olson (born August 18, 1975) is an American actress and comedian.  She began her career in the Groundlings, an improvisational group in Los Angeles, California, and had minor roles in several television series before being cast as Deandra "Sweet Dee" Reynolds on the FX black comedy series "It's Always Sunny in Philadelphia" in 2005.

Bekka Eaton: Bekka Eaton, the current Director of Theater at Miami University Hamilton in Hamilton, Ohio, got her start as part of the improvisational comedy troup The Second City in Chicago.  She went on to be cast as the Female DJ in Sixteen Candles and a larger role as Delta Burke's sister in the TV movie Day-O.  She is also the founder of the Greater Cincinnati teen improvisational group Dot.  Comedy.

The Mick (TV series): The Mick is an American sitcom television series broadcast on Fox.  Created by Dave Chernin and John Chernin, the series stars Kaitlin Olson, who is also an executive producer.  The series premiered on January 1, 2017, and resumed in its regular Tuesday night slot on January 3, 2017.  On January 11, 2017, Fox picked up the series for a full season of 17 episodes.

Supporting paragraphs: The Mick (TV series) Kaitlin Olson
Answer: the Groundlings