Problem: Background: Frank Vincent Zappa (December 21, 1940 - December 4, 1993) was an American musician, composer, activist and filmmaker. His work is characterized by nonconformity, free-form improvisation, sound experiments, musical virtuosity, and satire of American culture. In a career spanning more than 30 years, Zappa composed rock, pop, jazz, jazz fusion, orchestral and musique concrete works, and produced almost all of the 60-plus albums that he released with his band the Mothers of Invention and as a solo artist. Zappa also directed feature-length films and music videos, and designed album covers.
Context: Zappa and the Mothers of Invention returned to Los Angeles in mid-1968, and the Zappas moved into a house on Laurel Canyon Boulevard, only to move again to one on Woodrow Wilson Drive. This was Zappa's home for the rest of his life. Despite being a success with fans in Europe, the Mothers of Invention were not faring well financially. Their first records were vocally oriented, but Zappa wrote more instrumental jazz and classical oriented music for the band's concerts, which confused audiences. Zappa felt that audiences failed to appreciate his "electrical chamber music". In 1969 there were nine band members and Zappa was supporting the group himself from his publishing royalties whether they played or not. 1969 was also the year Zappa, fed up with MGM Records' interference, left them for Warner Bros. Records' Reprise subsidiary where Zappa/Mothers recordings would bear the Bizarre Records imprint. In late 1969, Zappa broke up the band. He often cited the financial strain as the main reason, but also commented on the band members' lack of sufficient effort. Many band members were bitter about Zappa's decision, and some took it as a sign of Zappa's concern for perfection at the expense of human feeling. Others were irritated by 'his autocratic ways', exemplified by Zappa's never staying at the same hotel as the band members. Several members played for Zappa in years to come. Remaining recordings with the band from this period were collected on Weasels Ripped My Flesh and Burnt Weeny Sandwich (both released in 1970). After he disbanded the Mothers of Invention, Zappa released the acclaimed solo album Hot Rats (1969). It features, for the first time on record, Zappa playing extended guitar solos and contains one of his most enduring compositions, "Peaches en Regalia", which reappeared several times on future recordings. He was backed by jazz, blues and R&B session players including violinist Don "Sugarcane" Harris, drummers John Guerin and Paul Humphrey, multi-instrumentalist and previous member of the Mothers of Invention Ian Underwood, and multi-instrumentalist Shuggie Otis on bass, along with a guest appearance by Captain Beefheart (providing vocals to the only non-instrumental track, "Willie the Pimp"). It became a popular album in England, and had a major influence on the development of the jazz-rock fusion genre.
Question: What did he do after recording Hot Rats?
Answer:

Problem: Background: O'Brien was born on April 18, 1963 in Brookline, Massachusetts. His father, Thomas Francis O'Brien, is a physician, epidemiologist, and professor of medicine at Harvard Medical School. His mother, Ruth O'Brien (nee Reardon), is a retired attorney and former partner at the Boston firm Ropes & Gray. O'Brien attended Brookline High School, where he served as the managing editor of the school newspaper, The Sagamore.
Context: O'Brien moved to Los Angeles after graduation to join the writing staff of HBO's Not Necessarily the News. He was also a writer on the short-lived The Wilton North Report. He spent two years with that show and performed regularly with improvisational groups, including The Groundlings. In January 1988, Saturday Night Live's executive producer, Lorne Michaels, hired O'Brien as a writer. During his three years on Saturday Night Live (SNL), he wrote such recurring sketches as "Mr. Short-Term memory" and "The Girl Watchers"; the latter was first performed by Tom Hanks and Jon Lovitz. O'Brien also co-wrote the sketch "Nude Beach" with Robert Smigel, in which the word "penis" was said or sung at least 42 times. While on a writers' strike from Saturday Night Live following the 1987-88 season, O'Brien put on an improvisational comedy revue in Chicago with fellow SNL writers Bob Odenkirk and Robert Smigel called Happy Happy Good Show. While living in Chicago, O'Brien briefly roomed with Jeff Garlin. In 1989, O'Brien and his fellow SNL writers received an Emmy Award for Outstanding Writing in a Comedy or Variety Series. O'Brien, like many SNL writers, occasionally appeared as an extra in sketches; his most notable appearance was as a doorman in a sketch in which Tom Hanks was inducted into the SNL "Five-Timers Club" for hosting his fifth episode. O'Brien returned to host the show in 2001 during its 26th season. O'Brien and Robert Smigel wrote the television pilot for Lookwell starring Adam West, which aired on NBC in 1991. The pilot never went to series, but it became a cult hit. It was later screened at The Other Network, a festival of unaired TV pilots produced by Un-Cabaret; it featured an extended interview with O'Brien and was rerun in 2002 on the Trio network. Things changed for O'Brien in 1991, when in quick succession, an engagement fell through; Lookwell was not picked up; and, burned out, he quit Saturday Night Live. "I told Lorne Michaels I couldn't come back to work and I just needed to do something else," O'Brien recalled. "I had no plan whatsoever. I was literally in this big transition phase in my life where I decided, I'll just walk around New York City, and an idea will come to me." Mike Reiss and Al Jean, then dual showrunners of The Simpsons, called O'Brien and offered him a job. The series was notorious in the writing community at the time; O'Brien recalls "everyone wanted to be on that show, but they never hired." O'Brien was one of the first hires after the show's original crew. With the help of old Groundlings friend Lisa Kudrow, O'Brien purchased an apartment in Beverly Hills. He and Kudrow became involved as well, and Kudrow believed he should begin performing rather than writing. O'Brien disagreed, feeling that Kudrow was being overly flattering and that asserting he was happy as a writer. In his speech given at Class Day at Harvard in 2000, O'Brien credited The Simpsons with saving him, a reference to the career slump he was experiencing prior to his being hired for the show.
Question: what did he do before this
Answer:
He was also a writer on the short-lived The Wilton North Report. He spent two years with that show and performed regularly with improvisational groups, including The Groundlings.