Question: The Killers and Nightmare and the Cat, have which mutual nationality?

full_context: Document 1: Boots (The Killers song): "Boots" is a Christmas song by Las Vegas rock band The Killers, which was released as a digital download on November 30, 2010, despite the band being on hiatus. All proceeds from the song go to AIDS charities as part of the (PRODUCT) campaign, headed by Bono and Bobby Shriver.
Document 2: Brandon Flowers: Brandon Richard Flowers (born June 21, 1981) is an American singer, songwriter and multi-instrumentalist. He is best known as the lead singer, keyboardist and occasional bass guitarist of the Las Vegas-based rock band The Killers, with whom he has recorded five studio albums.
Document 3: The Twilight Sad discography: The discography of Scottish rock band The Twilight Sad consists of four studio albums, four compilation albums, eleven singles, and five extended plays (EPs). The band currently consists of James Graham (vocals), Andy MacFarlane (guitar, producer), and Mark Devine (drums). The Kilsyth-based band formed in 2003 and were signed to Fat Cat Records when Alex Knight, co-founder of the label, went to Glasgow to watch the band perform their third gig and signed them on the spot. The band released their debut EP "The Twilight Sad" in November 2006 in the United States only, followed by their debut album "Fourteen Autumns & Fifteen Winters" in April 2007, which garnered widespread critical acclaim. The album spawned two singles, "That Summer, at Home I Had Become the Invisible Boy" in April, and "And She Would Darken the Memory" in July. The following year, the band released "Here, It Never Snowed. Afterwards It Did", a mini-album of reworked versions of songs from "Fourteen Autumns & Fifteen Winters" and two non-album tracks, inspired by stripped-down live performances. A collection of live versions and previously unreleased tracks entitled "Killed My Parents and Hit the Road" was released in December 2008. The Twilight Sad's second studio album, "Forget the Night Ahead", was released in September 2009 to further acclaim and marked a shift in the band's direction towards a darker and more streamlined sound. The album produced three singles: "I Became a Prostitute" in August 2009, "Seven Years of Letters" in October 2009, and "The Room" in April 2010. Founding bassist Craig Orzel left the band in February 2010, and the band released "The Wrong Car" EP in September of that year.
Document 4: The xx: The xx are an English indie pop band formed in 2005 in Wandsworth, London, and currently consists of Oliver Sim (bass, vocals), Romy Madley Croft (guitar, vocals) and Jamie xx (beats, MPC, record production). They are best known for their distinct and unique minimalistic sound that blends the likes of indie pop, indie electronic, dream pop and electronic rock and the dual vocalist setup of both Croft and Sim.
Document 5: Brian Karscig: Brian Joseph Karscig is a musician, songwriter, and record producer, but is mostly recognized as the co-singer/guitarist/songwriter for the American Rock and Roll Band Louis XIV signed to Atlantic Records. He also is the singer/guitarist/songwriter of American Rock Band The Nervous Wreckords. Karscig owns Nervous Productions, and co-owner of "The Pineapple Recording Group", and has produced records for artists such as Anya Marina (Slow and Steady Seduction: Phase II) for Chopshop/Atlantic Records, The Silent Comedy, Transfer, Les Gars, Apes of Wrath, Republic of Letters, and Subsurfer. Aside from his songwriting with LOUIS XIV, and The Nervous Wreckords, Karscig is also known for his co-writes with Brandon Flowers of The Killers ("Thief in the Choir" and "Turn the Light On"), and Sam Endicott of The Bravery ("Send it in a Letter"), as well as Anya Marina ("Afterparty at Jimmy's) and A.J. Croce's 2013 single "Keep the Change". Karscig is also credited with additional vocals on The Killers 2006 release "Sam's Town". Most recently Karscig toured South America as the piano/guitar player for Brandon Flowers "Desired Effect" Tour, and also joined The Killers as 2nd guitar player for their 2016 US/Canada tour. Although The Nervous Wreckords was Karscig's solo effort after Louis XIV, Karscig started his first solo record under his birth name Brian Karscig due out early 2017.
Document 6: Late Night Tales: Django Django: Late Night Tales: Django Django is a mix album compiled by British band Django Django, released on 11 May 2014 as part of the "Late Night Tales" series. The mix includes tracks from artists such as The Beach Boys, Primal Scream, Outkast, Massive Attack and Philip Glass. It also features an exclusive Django Django cover version of The Monkees’ "Porpoise Song".
Document 7: Nightsongs (Stars album): Nightsongs is the first album by Canadian indie rock band Stars, released in 2001 on Le Grand Magistery. At this time, Stars consisted only of Torquil Campbell and Chris Seligman, although both Amy Millan and Emily Haines of Metric make appearances. There is also a very rare vinyl pressing of the record on the Japanese label Syft, which has since gone out of business. The vinyl pressing also has 2 additional tracks ("Friend's Father's Mother" and "Angeline") not featured on the CD version.
Document 8: Nightmare (Avenged Sevenfold album): Nightmare is the fifth studio album by American heavy metal band Avenged Sevenfold. It was released on July 27, 2010 through Warner Bros. Records. It was produced by Mike Elizondo and mixed in New York City by noted engineer Andy Wallace. "Nightmare" is the first Avenged Sevenfold record without James "The Rev" Sullivan performing drums on all the songs due to his death in December 2009; however he did write parts that were used for the final recordings, making this the last album he would write on, The Rev's vocals are still on the album as a tribute to him. This is the only album to feature ex-Dream Theater drummer Mike Portnoy, who performed as the drummer for the album in his place, also played with the band for all their tours through the end of 2010, due to his separation with Dream Theater. They then hired drummer Arin Ilejay, who played with the band for the next four years. The album has been certified Gold by the RIAA in the United States. The album debuted at number 1 in the "Billboard" 200. As of December 2016 the album has sold 964,000 copies in the United States.
Document 9: Battle Born Studios: Battle Born Studios, located in the Winchester, Nevada, is a 2000 sqft recording studio owned by The Killers. The studio has hosted groups including Mötley Crüe, B.B. King, Elton John, The Killers, and Imagine Dragons.
Document 10: Cat's Eyes: Cat's Eyes are an alternative pop duo formed in early 2011 by vocalist Faris Badwan (known for his work with English indie rock band the Horrors) and Italian-Canadian soprano, composer and multi-instrumentalist Rachel Zeffira.
Document 11: Nightmare and the Cat: Nightmare and the Cat is a five-piece British-American indie rock band that formed in 2010. The band consists of Django Stewart (vocals), Samuel Stewart (guitar), Claire Acey (vocals), Scott Henson (bass) and Spike Phillips (drums).
Document 12: Killer Be Killed: Killer Be Killed is an American heavy metal supergroup founded by The Dillinger Escape Plan vocalist Greg Puciato and Soulfly, Cavalera Conspiracy and ex-Sepultura frontman Max Cavalera in early 2011. The lineup also features Mastodon bassist and co-vocalist Troy Sanders and Converge drummer Ben Koller. The band had slowly been working on material before announcing its name in October 2013, along with their signing to Nuclear Blast. The group's self-titled debut record was released on May 13, 2014. As of August 2017 they have sold more than 11,000 Records.
Document 13: Night People (You Me at Six album): Night People is the fifth studio album by English rock band You Me at Six. It was released on 6 January 2017 through BMG and Infectious Music. The album sees a departure from the band's usual style for a much darker and heavier tone.
Document 14: The Killers: The Killers are an American rock band formed in Las Vegas, Nevada, in 2001 by members Brandon Flowers (lead vocals, keyboards, bass) and Dave Keuning (guitar, backing vocals). Mark Stoermer (bass, guitar, backing vocals) and Ronnie Vannucci, Jr. (drums, percussion) would complete the current line-up of the band in 2002. The band's name is derived from a logo on the bass drum of a fictitious band, portrayed in the music video for the New Order song "Crystal".
Document 15: List of Panic! at the Disco band members: Panic! at the Disco is an American rock band from Las Vegas, Nevada, formed in 2004 and featuring the current lineup of lead vocalist Brendon Urie, accompanied on tour by bassist Dallon Weekes, lead guitarist Kenneth Harris, and drummer Dan Pawlovich. The group was originally formed by former members Spencer Smith and Ryan Ross. The band has gone through multiple line-up changes in their career spanning five albums. There have been six official members of Panic! at the Disco, six touring members and twenty-six session members.
ground_truth: American