Question: Of the two rock bands, Okkervil River or Hüsker Dü, which began as a trio made up of Shef and friends?

Context paragraphs:
The Stage Names: The Stage Names is the fourth full-length studio album by American indie rock band Okkervil River, released on August 7, 2007.  The album was recorded in Austin, Texas, with longtime Okkervil producer Brian Beattie, and with mixing from Spoon drummer and producer Jim Eno.  Like other Okkervil River albums, the accompanying artwork is the work of artist William Schaff.  The cover refers to a line from "Unless It's Kicks".  The record was also released as a limited-edition 2-CD set that included a second disc of solo acoustic demos.  A newly recorded version of "Love to a Monster", which appeared in rough demo form on the band's tour EP, "Overboard and Down", was originally intended to appear on the album, but didn't make it on, and appears as a bonus track when the album is purchased through eMusic.  "Shannon Wilsey on the Starry Stairs", described by lead singer and songwriter Will Sheff as "kind of a sequel to 'Savannah Smiles' and kind of a sister song to "John Allyn Smith Sails'", is included as a bonus track when the album is purchased through iTunes.

Jay's Longhorn Bar: Jay's Longhorn Bar, most frequently referred to by patrons as The Longhorn, was a nexus of the punk music scene in Minneapolis, Minnesota, in the late 1970s and early 1980s, described by music critics as a "legendary" part of the genre's history and a "punk rocker's paradise."  One of the earliest clubs in America to regularly book punk, New Wave, and alternative-rock bands, the Longhorn was the only concert stage in Minnesota where touring acts in those genres could regularly perform until the opening of what would become First Avenue in 1980. " The Police, Blondie, all the big acts played there," wrote Hüsker Dü guitarist Bob Mould, who frequented the venue and noted that he considered Hüsker Dü "an actual band" only after they had performed on the Longhorn stage.  Robert Wilkinson, singer for Minneapolis punk band Flamingo, noted that in terms of importance to the scene, “The Longhorn was Minneapolis’ CBGB’s.”

Hüsker Dü discography: The discography of Hüsker Dü, an American punk rock band, consists of six studio albums, two live albums, one compilation album, two extended plays, and ten singles.  The band was formed by Bob Mould (guitar, vocals), Grant Hart (drums, vocals), and Greg Norton (bass guitar) in 1979.  Their first album release was "Land Speed Record", a live album released through New Alliance Records.  The band released its first studio album, "Everything Falls Apart" on its own label (Reflex Records) the following year.  Hüsker Dü signed with SST Records in 1983, and released its next three albums with that label.  The Warner Music Group released the band's last two studio albums.  Hüsker Dü broke up in 1987.  The band released 5 albums, including two double albums, between January 1984 and January 1987.

Hüsker Dü: Hüsker Dü was an American rock band formed in Saint Paul, Minnesota, in 1979.  The band's continual members were guitarist/vocalist Bob Mould, bassist Greg Norton, and drummer/vocalist Grant Hart.  Hüsker Dü first gained notability as a hardcore punk band, later crossing over into alternative rock.  Mould and Hart were the principal songwriters for Hüsker Dü, with Hart's higher-pitched vocals and Mould's baritone taking the lead in alternating songs.

Okkervil River: Okkervil River is an American rock band led by singer-songwriter Will Sheff.  Formed in Austin, Texas in 1998, the band takes its name from a short story by Russian author Tatyana Tolstaya set on the river in St Petersburg.  They began as a trio made up of Sheff and friends he had met in his native state of New Hampshire but, over time, have gone through many lineups.

Warehouse: Songs and Stories: Warehouse: Songs and Stories (1987) is the sixth and final studio album by alternative rock band Hüsker Dü, originally released by Warner Bros.  Records as a double album on two vinyl LPs.  The band dissolved following the tour in support of its release, in part due to disagreements between songwriters Bob Mould and Grant Hart over the latter's drug use.  This album, along with "Candy Apple Grey", showcases the increasing maturity of Mould and Hart's writing—a change which alienated some long-time fans.  This album is also known for its battle between the two songwriters, with Mould famously telling Hart that he would never have more than half of the songs on a Hüsker Dü album.

Circle of Friends (Bob Mould video): Circle of Friends is a DVD by Bob Mould of a live concert recorded in 2005 at the in Washington, D.C.  The performance included songs from Mould's earlier bands Hüsker Dü and Sugar, as well as his solo work.  This particular show was part of the "Body of Song" tour, Mould's first non-solo tour for over a decade and the first one in which Hüsker Dü material was played in a band format since the band broke up in 1988.

Sham Wedding/Hoax Funeral: Sham Wedding/Hoax Funeral is a split CD featuring Austin, Texas "brother bands" Okkervil River and Shearwater.  It was first available only at North American tour dates in the spring and summer of 2004, but fans later were able to purchase it online.  The tracks include demos, unreleased songs and old standards.  Mark Pedini, former drummer of Okkervil River, provided the artwork for the album cover.

Will Sheff: Will Sheff (born July 7, 1976) is the frontman for the Austin, Texas-based indie band Okkervil River (1998–present).  Originally from Meriden, New Hampshire, he is also a founding member and co-songwriter (along with former Okkervil bandmate Jonathan Meiburg) for Shearwater (2001–2009), another Austin band.  Sheff writes and performs many songs as a solo artist while juggling his commitments to Okkervil River and Shearwater, but has released just one single as a solo artist.  As well as writing and singing songs, he plays the guitar, the piano, the banjo, and the harmonica.

Reflex Records: Reflex Records was an American independent record label formed by the members of hardcore punk band Hüsker Dü and Terry Katzman.  It was formed to help promote independent bands, after Twin/Tone Records rejected Hüsker Dü's first single in 1979.

Supporting paragraphs: Hüsker Dü Okkervil River
Answer: Okkervil River