Question: What position did Mike Scully and Al Jean both hold at varying times in the Simpsons?

full_context: Document 1: Mike Scully: Michael "Mike" Scully (born October 2, 1956) is an American television writer and producer. He is known for his work as executive producer and showrunner of the animated sitcom "The Simpsons" from 1997 to 2001. Scully grew up in West Springfield, Massachusetts and long had an interest in writing. He was an underachiever at school and dropped out of college, going on to work in a series of jobs. Eventually, in 1986, he moved to Los Angeles where he worked as a stand-up comic and wrote for Yakov Smirnoff.
Document 2: Michael Schur: Michael Herbert "Mike" Schur (born October 29, 1975) is an American television producer and writer, best known for his work on the NBC comedy series "The Office" and "Parks and Recreation", the latter of which he co-created along with Greg Daniels. He also co-created the FOX comedy series "Brooklyn Nine-Nine", and created the NBC comedy series "The Good Place". Schur is also known for his small role on "The Office" as Mose Schrute, the cousin of Dwight Schrute.
Document 3: Barting Over: "Barting Over" is the eleventh episode of the fourteenth season of "The Simpsons", advertised by Fox, and indicated on-screen to be the 300th episode of the show (though in broadcast order, it is the 302nd episode, as noted in the episode proper). It originally aired on the Fox network in the United States on February 16, 2003. In this episode, Bart discovers that he used to be a child star in commercials—and that Homer spent all the money he earned. In retaliation, Bart petitions the court to be legally emancipated, and he moves out of the house.
Document 4: The Simpsons (season 5): "The Simpsons"' fifth season originally aired on the Fox network between September 30, 1993 and May 19, 1994. The showrunner for the fifth production season was David Mirkin who executive produced 20 episodes. Al Jean and Mike Reiss executive produced the remaining two, which were both hold overs that were produced for the previous season. The season contains some of the series' most acclaimed episodes, including "Cape Feare" and "Rosebud". It also includes the 100th episode, "Sweet Seymour Skinner's Baadasssss Song". The season was nominated for two Primetime Emmy Awards and won an Annie Award for Best Animated Television Program as well as an Environmental Media Award and a Genesis Award. The DVD box set was released in Region 1 on December 21, 2004, Region 2 on March 21, 2005, and Region 4 on March 23, 2005.
Document 5: The Simpsons (season 13): "The Simpsons"' thirteenth season originally aired on the Fox network between November 6, 2001 and May 22, 2002 and consists of 22 episodes. The show runner for the thirteenth production season was Al Jean who executive-produced 17 episodes. Mike Scully executive-produced the remaining five, which were all hold-overs that were produced for the previous season. "The Simpsons" is an animated series about a working-class family, which consists of Homer, Marge, Bart, Lisa, and Maggie. The show is set in the fictional city of Springfield, and lampoons American culture, society, television and many aspects of the human condition.
Document 6: Steve Carell: Steven John Carell ( ; born August 16, 1962) is an American actor, comedian, director, producer, and writer. Carell is best known for playing Michael Scott on the American version of "The Office" (2005–2011), on which he also worked as an occasional writer, producer, and director.
Document 7: The Simpsons (season 14): "The Simpsons"' fourteenth season was originally broadcast on the Fox network in the United States between November 3, 2002 and May 18, 2003. The show runner for the fourteenth production season was Al Jean, who executive produced 21 of 22 episodes. The other episode, "How I Spent My Strummer Vacation", was run by Mike Scully. The season contains five hold-overs from the previous season's production run. The fourteenth season has met with mostly positive reviews and won two Primetime Emmy Awards, including Outstanding Animated Program (For Programming less than One Hour), four Annie Awards and a Writers Guild of America Award. On December 6, 2011, it was released on DVD and Blu-ray in North America. This season contains the show's 300th episode, "The Strong Arms of The Ma".
Document 8: Strong Arms of the Ma: "Strong Arms of the Ma" is the ninth episode of "The Simpsons"<nowiki>'</nowiki> fourteenth season. It originally aired on the Fox network in the United States on February 2, 2003. It is the 300th episode to be broadcast; though "Barting Over" is indicated on-screen to be the 300th episode, it is actually the 302nd. In the episode, Marge develops agoraphobia in response to a traumatic mugging and overcomes the fear through exercise and bodybuilding, which ultimately leads to her taking anabolic steroids and experiencing a change in personality.
Document 9: Greg Daniels: Gregory Martin "Greg" Daniels (born June 13, 1963) is an American television comedy writer, producer, and director. He is known for his work on several television series, including "Saturday Night Live", "The Simpsons", "Parks and Recreation", "King of the Hill" and "The Office". All four shows were named among "Time"' s James Poniewozik's All Time 100 TV Shows. Daniels attended Harvard University and he became friends with Conan O'Brien. Their first writing credit was for "Not Necessarily the News", before they were laid off due to budget cuts. He eventually became a writer for two long-running series: "Saturday Night Live" and "The Simpsons".
Document 10: The Simpsons (season 4): "The Simpsons"' fourth season originally aired on the Fox network between September 24, 1992 and May 13, 1993, beginning with "Kamp Krusty". The showrunners for the fourth production season were Al Jean and Mike Reiss. The aired season contained two episodes which were hold-over episodes from season three, which Jean and Reiss also ran. Following the end of the production of the season, Jean, Reiss and most of the original writing staff left the show. The season was nominated for two Primetime Emmy Awards and Dan Castellaneta would win one for his performance as Homer in "Mr. Plow". The fourth season was released on DVD in Region 1 on June 15, 2004, Region 2 on August 2, 2004 and in Region 4 on August 25, 2004.
Document 11: Julie Thacker: Julie Thacker is an American television writer. She has written for "The Simpsons", and along with her husband "The Simpsons" writer and producer Mike Scully she has co-created "The Pitts" and "Complete Savages".
Document 12: The Simpsons (season 12): "The Simpsons"' twelfth season originally aired between November 2000 and May 2001. It began on Wednesday, November 1, 2000 with "Treehouse of Horror XI". The season contains four hold-over episodes from the season 11 (BABF) production line. The showrunner for the twelfth production season was Mike Scully. The season won and was nominated for numerous awards including two Primetime Emmy Awards wins and an Annie Award.
Document 13: The Simpsons (season 7): "The Simpsons"' seventh season originally aired on the Fox network between September 17, 1995 and May 19, 1996. The show runners for the seventh production season were Bill Oakley and Josh Weinstein who would executive produce 21 episodes this season. David Mirkin executive produced the remaining four, including two hold overs that were produced for the previous season. The season was nominated for two Primetime Emmy Awards, including Outstanding Animated Program and won an Annie Award for Best Animated Television Program. The DVD box set was released in Region 1 December 13, 2005, Region 2 January 30, 2006 and Region 4 on March 22, 2006. The set was released in two different forms: a Marge-shaped box and also a standard rectangular-shaped box in which the theme is a movie premiere.
Document 14: John Swartzwelder: John Joseph Swartzwelder, Jr. (born February 8, 1949) is an American comedy writer and novelist, best known for his work on the animated television series "The Simpsons". Born in Seattle, Washington, Swartzwelder began his career working in advertising. He was later hired to work on comedy series "Saturday Night Live" in the mid-1980s as a writer. He later contributed to fellow writer George Meyer's short-lived "Army Man" magazine, which led him to join the original writing team of "The Simpsons", beginning in 1989.
Document 15: Richard Appel: Richard James Appel (born May 21, 1963) is an American writer, producer and former attorney. Since 2012, he has served as an Executive Producer and co-showrunner of "Family Guy" on Fox. Growing up in Wilmette, Illinois, Appel developed a love of comedy and dreamed of a career as a comedy writer; he attended Harvard University and wrote for the "Harvard Lampoon". Following in his mother's footsteps, Appel instead became a lawyer. After attending law school he started out as a law clerk for Judge John M. Walker, Jr. before becoming a federal attorney, serving as assistant U.S. attorney for the United States District Court for the Southern District of New York for three years. In 1994, he moved into comedy writing when he was hired for "The Simpsons", writing seven episodes of the show including "Mother Simpson". He moved on to become showrunner and executive producer of "King of the Hill" before creating the sitcom "A.U.S.A.". He then worked on "The Bernie Mac Show", "Family Guy" and "American Dad!" before co-creating "The Cleveland Show". He was married to the writer Mona Simpson.
ground_truth: showrunner