Question: How many members does the band who released the extended play (EP) Signal consist of?

Context articles: Pacific Gold
Platoon 1107
Suicide Prevention Hotline
Jeffree Star discography
The Shawn Mendes EP
Sam Sparro discography
Twice (band)
Twice discography
Signal (EP)
Arcade Fire (EP)

Pacific Gold, (formerly, Wayfarer), is an American Christian music band.
 They come from Seattle, Washington.
 The band started making music in 2012.
 Their membership is Torry Anderson, Brian Hibbard, Dan Koch, John Raines, and David Stuart.
 The band released, an extended play, "The River", independently, in 2012, also the same year, another extended play released independently, "The Holly & the Ivy".
 They released, a third extended play, "Pacific Gold", in 2013, independently.
 Their first studio album, "Sing My Welcome Home", was released by BC Music, standing for Bad Christian Music, in 2015.
Platoon 1107 is an American patriotic punk rock music band that primarily plays Heavy metal music influenced hardcore punk and skate punk, and at times crossover.
 This project was started in California in 2012 by a United States Marine Corps veteran, Jimmy Sisco, who writes and plays all the instruments on their recordings.
 The project's first two releases, with Thumper Punk Records and Veritas Vinyl, "We Glory in the Title" (a studio album), and an extended play, "Live Free or Die", were released on the same day in 2012.
 The second extended play, "Marine Forever...Forever Marine", was first self-released in December 2013.
 The project did a split-EP, with The Cants earlier the same year.
 In late 2016 the band issued four EP's in 5 weeks via Thumper Punk Records: "The Tourettes EP, The Straight Edge EP, Marine Forever...Forever Marine," and the "Alive I" live album, which was recorded at Angel City in Bellflower, California in 2014.
Suicide Prevention Hotline EP is an official extended play release from Alaska in Winter.
 It debuted 31 May 2011 through the band's Blogspot account, and a note published on its Facebook page.
 According to frontman Brandon Bethancourt, although the extended play is available merely on twenty micro-cassettes through his BigCartel page as an exclusive pre-release, the extended play will formally be released in "CD and mp3 form soon."
 The limited-edition micro-cassette format is designed for usage in telephone answering machines lest the "unanswered cries" from the extended play not be heard by listeners.
 Additionally, the limited-edition "pre-release" package includes a pill bottle, which contains a personal, but brief, message, written by Bethancourt himself.
The discography of American singer-songwriter Jeffree Star consists of one studio album, three extended plays, five singles and four music videos.
 After self-releasing an extended play "Plastic Surgery Slumber Party" in 2007, Star founded his own label Popsicle Records.
 He released his second extended play, "Cupcakes Taste Like Violence", in December 2008.
 The extended play produced one commercial single, "Lollipop Luxury".
 In September 2009, Star released his debut studio album, "Beauty Killer".
 The album produced one commercial single, "Prisoner" and two music videos for "Get Away with Murder" and "Beauty Killer".
 On October 2, 2012, Star released a four-track single called "Mr. Diva" to tide fans over and play new music on tour.
 "Mr. Diva" was also released as a limited edition vinyl record with "Legs Up" being the B-side track; it was a red heart shape with 500 copies printed.
 Star released his single "Love to My Cobain" on June 25, 2013 with the music video being released August 15.
The Shawn Mendes EP is the debut extended play by Canadian singer Shawn Mendes, released on July 28, 2014 by Island Records.
 It debuted at number 5 on the U.S. "Billboard" 200 chart with sales of 48,000 copies in its first week.
 The EP includes the single "Life of the Party", which was a moderate success.
 The extended play was later removed from the iTunes Store and "Show You", "One of Those Nights" and "The Weight" were released as separate promotional singles.
 "The Weight" was included in the deluxe edition of Mendes' debut studio album "Handwritten".
 As of April 2016, the EP has sold 103,000 copies in the United States.
Sam Sparro, the Australian born pop, dance, house, and soul singer-songwriter, producer, and remix engineer, has released two studio albums. His eponymous debut album, "Sam Sparro", released through both Modus Vivendi and Island Records, has been certified Gold.
 His second album, "Return to Paradise" was released with EMI.
 He has released two mixtapes. On August 5, 2013 Sparro released the mixtape "Mechanical."
 to his SoundCloud account to promote his upcoming extended play, "Quantum Physical, Vol.
 1".
"Love Made Me Do It" was released via his SoundCloud account on February 13, 2015.
 Sparro has released five extended plays. His first extended play "Black + Gold" was released by Modus Vivendi Music in January 2007.
 "London Festival '08" was first released on January 1, 2008 with Island Records.
 Sparro released his third extended play, "Pink Cloud", as a free download to promote his then upcoming second album before a number of release push-backs.
 He released "Quantum Physical, Vol.
 1" independently on October 1, 2014.
 On October 16, 2015 Sparro released the second volume of "Quantum Physical" with Intuit Records.
Twice (; Japanese: トゥワイス) is a South Korean girl group formed by JYP Entertainment through the 2015 reality show "Sixteen".
 The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu.
 The group debuted on October 20, 2015 with the extended play (EP) "The Story Begins".
South Korea-based girl group Twice have released four extended plays (one of which was reissued under a different title), one compilation album, one compilation EP, and five singles.
 Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh".
 The EP and the single peaked at No. 3 and No. 10 on the Gaon Music Chart, respectively.
 "The Story Begins" eventually sold over 120,000 copies, becoming the best-selling debut extended play by a K-pop girl group of all time, breaking the record set by Girls' Generation's first extended play "Gee" (2009), which sold nearly 100,000 copies.
Signal is the fourth extended play (EP) by South Korean girl group Twice.
 The EP was released digitally and physically on May 15, 2017 by JYP Entertainment and distributed by Genie Music.
Arcade Fire (known unofficially as Us Kids Know) is a self-titled extended play (EP) by the indie rock band Arcade Fire.
 The EP was recorded in Maine, United States, during the summer of 2002.
 "Arcade Fire" was remastered and repackaged for its 2005 re-release by Merge Records for fans after they had "grown obsessed" with the band's debut album, "Funeral".
 It was initially released in 2003 by the band at their shows and website, and then re-released in 2005 by Merge.
 It received positive reviews from music critics, although some of them noted that it was inferior to their debut album "Funeral".
 Lyrical themes of "Arcade Fire" consist of parents, suburbia, new love, dread, and drama.
 The EP's third track, "No Cars Go", was re-recorded for Arcade Fire's second full-length album, "Neon Bible".
 No Cars Go has been played at the majority of live shows since the EP release.
 Arcade Fire have also played other songs from the EP, live on every tour since.
 However it has become less frequent.
 On their most recent tour, for "Reflektor", they notably performed Headlights Look Like Diamonds.