Background: Steely Dan is an American rock band founded by core members Walter Becker (guitars, bass, backing vocals) and Donald Fagen (keyboards, lead vocals) in 1972. Blending elements of jazz, traditional pop, R&B, and sophisticated studio production with cryptic and ironic lyrics, the band enjoyed critical and commercial success starting from the early 1970s until breaking up in 1981. Throughout their career, the duo recorded with a revolving cast of session musicians, and in 1974 retired from live performances to become a studio-only band. Rolling Stone has called them "the perfect musical antiheroes for the Seventies".
Context: Pretzel Logic was released in early 1974. A diverse set, it includes the group's most successful single "Rikki Don't Lose That Number" (No. 4) and a note-for-note rendition of Duke Ellington and James "Bubber" Miley's "East St. Louis Toodle-Oo". During the previous album's tour, the band had added vocalist-percussionist Royce Jones, vocalist-keyboardist Michael McDonald, and session drummer Jeff Porcaro (of Sonny & Cher). Porcaro contributed significantly to Pretzel Logic (as he would on future Steely Dan recordings), reflecting Steely Dan's increasing reliance on session musicians (including Dean Parks and Rick Derringer). Drummer Jeff Porcaro and Katy Lied pianist David Paich would go on to form Toto. Striving for perfection, Becker and Fagen sometimes asked musicians to record as many as forty takes of each track. Pretzel Logic was the first Steely Dan album to feature Walter Becker on guitar. "Once I met (session musician) Chuck Rainey", he explained, "I felt there really was no need for me to be bringing my bass guitar to the studio anymore". A rift began growing between Becker-Fagen and Steely Dan's other members (particularly Baxter and Hodder), who wanted to tour. Becker and Fagen disliked constant touring and wanted to concentrate solely on writing and recording. The other members gradually left the band, discouraged by this and by their diminishing roles in the studio. However, Dias remained with the group until 1980's Gaucho and Michael McDonald contributed vocals until the group's twenty-year hiatus after Gaucho. Baxter and McDonald went on to join The Doobie Brothers. Steely Dan's last tour performance was on July 5, 1974, a concert at the Santa Monica Civic Auditorium in California. A recording of the show's opening track, "Bodhisattva", was released as a B-side, and later appeared on the compilation album Gold. Becker and Fagen recruited a diverse group of session players for Katy Lied (1975), including Porcaro, Paich, and McDonald, as well as guitarist Elliott Randall, jazz saxophonist Phil Woods, saxophonist/bass-guitarist Wilton Felder, percussionist/vibraphonist/keyboardist Victor Feldman, keyboardist (and later producer) Michael Omartian, and guitarist Larry Carlton -- Dias, Becker, and Fagen being Steely Dan's only original members. The album went gold on the strength of "Black Friday" and "Bad Sneakers", but Becker and Fagen were so dissatisfied with the album's sound (compromised by a faulty DBX noise reduction system) that they publicly apologized for it (on the album's back cover) and for years refused to listen to it in its final form. Katy Lied also included "Doctor Wu" and "Chain Lightning".
Question: was it succesful?
Answer: it includes the group's most successful single

Background: Uncle Tupelo was an alternative country music group from Belleville, Illinois, active between 1987 and 1994. Jay Farrar, Jeff Tweedy, and Mike Heidorn formed the band after the lead singer of their previous band, The Primitives, left to attend college. The trio recorded three albums for Rockville Records, before signing with Sire Records and expanding to a five-piece. Shortly after the release of the band's major label debut album Anodyne, Farrar announced his decision to leave the band due to a soured relationship with his co-songwriter Tweedy.
Context: Uncle Tupelo is credited as one of the founders of the alternative country genre, a blend of alternative rock and traditional country music. While the genre eventually became associated with solo artists such as Gram Parsons and Lyle Lovett, Uncle Tupelo is considered the first alternative country band. Some media outlets like the BBC have even suggested that they were the genre's sole creator. However, Tweedy and Heidorn dispute this claim, and Farrar says that there is no difference between alternative country and other genres such as roots rock. Heidorn commented in a Country Standard Time interview: It's strange to hear Uncle Tupelo mentioned because what we were doing was in such a long line of musical history. People are wrong in starting with us and saying we started anything because we were just picking up the ball, starting with Woody Guthrie and on to the early '60s and the Flying Burrito Brothers that we were influenced by. We didn't start a genre. We contributed to a long line of fairly good music. That's the way we looked at it at the time--doing what was right for the song. The band's first three albums influenced contemporary roots rock artists such as Richmond Fontaine and Whiskeytown. Uncle Tupelo's usage of distorted guitars to play a style of music that was known for its earnestness became a lasting trend in 1990s modern rock. Jason Ankeny wrote in Allmusic that: With the release of their 1990 debut LP, No Depression, the Belleville, IL, trio Uncle Tupelo launched more than simply their own career--by fusing the simplicity and honesty of country music with the bracing fury of punk, they kick-started a revolution which reverberated throughout the American underground. Their 1990 album No Depression lent its name to an influential alternative country periodical. Due to the influence of the album and periodical, the term "No Depression" became a byword for alternative country--particularly for bands with punk rock influence. The alternative country movement played an important role in the success of future traditionalist country acts such as Robbie Fulks and Shelby Lynne.
Question: what are they most known for
Answer:
Their 1990 album No Depression