Question: The Simpsons episode "Moaning Lisa" and "The Simpsons Sing the Blues" were both released what year?

Context articles: My Love Is Cool
Songs in the Key of Springfield
Do the Bartman
The Simpsons discography
The Simpsons Sing the Blues
Moaning Lisa
Deep, Deep Trouble
The Yellow Album
Four Great Women and a Manicure
Patty and Selma

My Love Is Cool is the debut studio album by the alternative rock band Wolf Alice, released on 22 June 2015 in the UK and 23 June 2015 in the US on Dirty Hit Records.
 This album includes the previously released singles "Bros" and "Fluffy" in re-recorded versions, and was preceded by the songs "Giant Peach" and "You're a Germ".
 The song "Moaning Lisa Smile", which originally appeared on the EP "Creature Songs", charted within the top 10 of the US Billboard Alternative Songs chart peaking at #9, and was also included for the US release of the album.
 The album was nominated for the 2015 Mercury Music Prize.
 In 2016, a deluxe edition of the album was released, containing the "Blush" and "Creature Songs" EPs, along with the B-sides to the early "Bros" and "Fluffy" singles and some more previously released material.
Songs in the Key of Springfield is a soundtrack/novelty album from "The Simpsons" compiling many of the musical numbers from the series.
 The album was released in the United States on March 18, 1997, and in the United Kingdom in June 1997.
 This was the second album released in association with the "Simpsons" television series; however, the previous release, "The Simpsons Sing the Blues", contained original recordings as opposed to songs featured in episodes of the series.
"Do the Bartman" is a song from the 1990 "Simpsons" album "The Simpsons Sing the Blues".
 It was performed by "The Simpsons" cast member Nancy Cartwright (the voice of Bart Simpson), with backing vocals from Michael Jackson, alongside additional vocals from Dan Castellaneta (voice of Homer Simpson).
 It was produced and written by American recording artist Bryan Loren, and released as a single on November 20, 1990.
"The Simpsons" is an American animated television sitcom created by Matt Groening that has aired on the Fox Broadcasting Company since December 1989.
 It is a satirical parody of a middle class American lifestyle epitomized by its eponymous family, which consists of Homer, Marge, Bart, Lisa and Maggie.
 The show is set in the fictional town of Springfield, and lampoons American culture, society, and many aspects of the human condition.
 The popularity of "The Simpsons" led to the release of the 1990 double platinum album "The Simpsons Sing the Blues", which contains original songs performed by the cast members of the show as their characters.
 The album spawned two hit singles—"Do the Bartman" and "Deep, Deep Trouble".
 A less successful sequel, "The Yellow Album", was released in 1998.
The Simpsons Sing the Blues is the first album released as an offshoot of "The Simpsons".
 The album contains originally recorded music not featured in the series save for the first verse of the track "Moaning Lisa Blues" which was first featured in the episode "Moaning Lisa", which aired in the United States on February 11, 1990.
 The album was released on December 4, 1990, and peaked at No. 3 on the "Billboard" 200.
"Moaning Lisa" is the sixth episode of "The Simpsons"<nowiki>'</nowiki> first season.
 It originally aired on the Fox network in the United States on February 11, 1990.
 The episode was written by Al Jean and Mike Reiss, and was directed by Wes Archer.
 Ron Taylor guest stars in the episode as Bleeding Gums Murphy.
 The episode deals with Lisa's depression and her attempts to sublimate it by playing her saxophone.
 It received positive reviews from television critics.
"Deep, Deep Trouble" is a rap song from the 1990 "Simpsons" album "The Simpsons Sing the Blues", sung by the fictional character Bart Simpson (voiced by Nancy Cartwright) about his trouble-making antics.
 It was written by Matt Groening and DJ Jazzy Jeff and recorded during late 1990.
 The song was released as the second single from the album in early 1991 and an accompanying music video (directed by Gregg Vanzo) was broadcast on television on March 7, 1991.
 This video has since been released on DVD as part of the 2002 boxset "The Simpsons: The Complete Second Season".
 "Deep, Deep Trouble" charted in several countries around the world, including the top ten in Ireland, New Zealand, and the United Kingdom.
 Critical reception of the song was positive and it has been praised for its humorous lyrics.
The Yellow Album is "The Simpsons" second album of originally recorded songs, released as a follow-up to the 1990 album "The Simpsons Sing the Blues".
 Though it was released in 1998, it had been recorded years earlier, after the success of the first album.
 The title is a play on the name of The Beatles' highly popular self-titled 1968 album, commonly known as ""The White Album"", with the skin color of the characters of "The Simpsons".
 In addition, the cover is a parody of The Beatles' 1967 album, "Sgt. Pepper's Lonely Hearts Club Band".
"Four Great Women and a Manicure" is the twentieth episode of the twentieth season of "The Simpsons".
 First broadcast on the Fox network in the United States on May 10, 2009, it was the second Simpsons episode (after "Simpsons Bible Stories") to have four acts instead of the usual three.
 The episode tells four tales of famous women featuring "Simpsons" characters in various roles: Selma as Queen Elizabeth I, Lisa as Snow White, Marge as Lady Macbeth and Maggie as Howard Roark from Ayn Rand's "The Fountainhead".
Patty and Selma Bouvier ( ) are fictional characters in the American animated sitcom "The Simpsons".
 They are identical twins (but with different hairstyles) and are both voiced by Julie Kavner.
 They are Marge Simpson's older twin sisters, who both work at the Springfield Department of Motor Vehicles, and possess a strong dislike for their brother-in-law, Homer Simpson.
 Selma is the elder by two minutes, and longs for male companionship while her sister, Patty, is a lesbian.
 Kavner voices them as characters who "suck the life out of everything".
 Patty and Selma first appeared on the first ever aired Simpsons episode "Simpsons Roasting On An Open Fire", which aired on December 17, 1989.