Question: What was the name of the second single that spawned from singer-songwriter Rufus Wainwright's "Want One"?

Context articles: Vibrate: The Best of Rufus Wainwright
Rufus Wainwright discography
Want One
The Best of Rufus Wainwright
Want (Rufus Wainwright album)
Rufus Wainwright: Live from the Artists Den
Waiting for a Want
I Don't Know What It Is
Oh What a World (song)
House of Rufus

Vibrate: The Best of Rufus Wainwright, sometimes referred to simply as Vibrate: The Best Of, is the greatest hits album by American-Canadian singer-songwriter Rufus Wainwright, released on February 28, 2014 in Australia and Ireland by Universal Music Enterprises and in other nations subsequently.
 The standard issue of the album includes eighteen songs from six of Wainwright's studio releases, including his self-titled debut album (1998), "Poses" (2001), "Want One" (2003), "Want Two" (2004), "Release the Stars" (2007) and "Out of the Game" (2012), plus soundtrack contributions and one previously unreleased track ("Me and Liza").
 The deluxe version includes a bonus disc with sixteen rare and unreleased recordings, both live and studio recorded.
 Featured are "Chic and Pointless", previously unreleased and produced by Guy Chambers, and "WWIII", a song that was co-written by Chambers and had not been released in a physical form until "Vibrate".
The discography of Rufus Wainwright, a Canadian-American singer-songwriter, consists of seven studio albums, three live albums, three compilations, three extended plays (EPs), three video albums, nine singles, and nine music videos. Wainwright's self-titled debut album was released through DreamWorks Records in May 1998.
 Although his success was limited, Wainwright reached #24 on "Billboard's" Top Heatseekers chart, and "Rolling Stone" named him 1998's Best New Artist.
 Wainwright's second album, "Poses", was released through the same label in June 2001, resulting in the #1 position on the Heatseekers Chart and #117 on the "Billboard" 200.
 With material recorded from the same session, "Want One" was released through DreamWorks in September 2003, and "Want Two" was released through Geffen Records in November 2004.
Want One is the third studio album by the Canadian-American singer-songwriter Rufus Wainwright, released through DreamWorks Records on September 23, 2003.
 The album was produced by Marius de Vries and mixed by Andy Bradfield, with Lenny Waronker as the executive in charge of production.
 "Want One" spawned two singles: "I Don't Know What It Is", which peaked at No. 74 on the UK Singles Chart, and "Oh What a World".
 The album charted in three countries, reaching No. 60 on the "Billboard" 200, No. 130 in France, and No. 77 in the Netherlands.
The Best of Rufus Wainwright is an ongoing concert tour by American-Canadian singer-songwriter Rufus Wainwright in support of his greatest hits album, "" (2014).
 The tour was announced on Wainwright's official website in December 2013, initially for 23 performances in more than 20 countries throughout Europe during March–April 2014.
 Subsequent dates were added in France, the United States and the United Kingdom, extending the number of concerts to 31.
 Wainwright's half-sister, Lucy Wainwright Roche, has been confirmed as the opening act for select dates.
Want is a repackaged double album by Canadian-American singer-songwriter Rufus Wainwright, released in the United Kingdom on November 28, 2005.
 It contains all the tracks from both "Want One" and "Want Two", along with two bonus tracks: a cover of Leonard Cohen's "Chelsea Hotel No. 2" along with "In with the Ladies".
Rufus Wainwright: Live from the Artists Den is a live album by American-Canadian singer-songwriter Rufus Wainwright, released by Artists Den Records and Universal Music Enterprises on March 3, 2014.
 The album was recorded at a concert on May 17, 2012 at the Church of the Ascension in Greenwich Village, New York City, which was originally filmed for the PBS program "Live from the Artists Den".
Waiting for a Want is the first EP by Canadian-American singer-songwriter Rufus Wainwright, released through DreamWorks Records electronically on June 29, 2004.
 At the time it was released, the collection previewed Wainwright's forthcoming album, "Want Two".
 Initially planned to be released shortly after "Want One", after plans of a double album fell through, the purchase of DreamWorks by Interscope delayed the release of "Want Two".
 The EP provided listeners with new material during this period.
 Admitting that he wanted to release "a couple of ditties" before the United States presidential election of 2004, Wainwright described the collection as "some of the more daunting tracks, the operatic, weird stuff, some heavy numbers that relate to my classical sensibilities".
"I Don't Know What It Is" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.
 It was the first single from Wainwright's third studio album "Want One" and was released in a slim-line jewel case format on July 26, 2004.
"Oh What a World" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.
 It was released as the second single from Wainwright's third studio album, "Want One" (2003), released digitally via iTunes and 7digital in the United Kingdom on November 8, 2004.
 Promotional copies were also distributed to radio stations in an attempt to increase awareness of the song and album.
 The song includes several arrangements from Maurice Ravel's Boléro.
House of Rufus is a collection of six studio albums, two live albums (one being a double album), four additional albums of previously unreleased material, and six DVDs recorded by Canadian-American singer-songwriter Rufus Wainwright, reissued as a 19-disc box set in the United Kingdom on July 18, 2011.
 Wainwright's official site claimed that the collection "spans Rufus' entire career and represents the most complete collection of Rufus Wainwright recordings to date."