Question: What was the nationality of the musician who made a guest appearance on 3 tracks in Skeletons & Majesties Live? 

Context articles: Yasue Sato
Colorblind (Chroma Key song)
Burek (album)
Skeletons &amp; Majesties Live
Guest appearance
Live from Vatnagarðar
Nashville Terminal Subdivision
Michael Kiske
Compact Jazz: The Swingle Singers
Amy Berg (writer)

Yasue Sato (佐藤 康恵 , Satō Yasue , born December 7, 1978 in the Saitama Prefecture, Honshū, Japan) is a Japanese actress and model, and formally trained in ballet.
 She made her acting debut in the movie Bounce Ko Gals (1997), for which she was given a Best New Talent award at the Yokohama Film Festival.
 She has since appeared in other feature films including I Love Peace (2003), Mimibukuro Ghost Stories (2004) and Welcome, Patient (2005).
 She has also made numerous stage performances, including Mirandolina (1998) and Wee Thomas (2003).
 in 2001, made a guest appearance in the movie Hyakujuu Sentai Gaoranger: Fire Mountain Roars.
 She played as Nagi Saijyo in Ultraman Nexus.
 Her most recent role was a guest appearance in GARO where she played as the Makai Priestess Jabi for 3 episodes.
 She returned to show in .
 She is also a music artist under the Japan Sony label.
 She was also the voice actress for Demento, or the voice actor for the video game, Haunting Ground.
 She worked under her stage name "さとう やすえ" (the same reading) from 2006 to 2012.
Colorblind is the only single released by ex-Dream Theater Keyboardist Kevin Moore, under his standard recording name, Chroma Key.
 The standard edit of "Colorblind" can be found as track 1 of the album Dead Air for Radios.
 The CD contains 6 tracks, including the feature radio edit single of "Colorblind", along with radio edits of two other tracks from the same album (On the Page and Even the Waves.)
 The CD also contains demo versions of the two aforementioned tracks, as well as a demo of a song called "Blanket", which did not appear on the album.
 The CD very rare and nearly impossible to buy, but a download version is available via the official website.
 This download edition features 3 bonus tracks, which are the 3 tracks from the original 1995 Chroma Key Demo.
 This Demo features demo versions of "On the Page", "Watercolor" and "Chroma Key".
 The demo version of "On the Page" found on the CD proper differs from the original 1995 demo version, found on the download version of the single.
Burek is the ninth studio album by Bosnian musician Dino Merlin.
 "Burek" was released in 2004.
 Three songs were featured as singles: "Burek", "Supermen" and "Ako Nastaviš Ovako".
 This album includes 15 tracks, many of which are new.
 The song "Supermen" is sung by Dino Merlin with a guest appearance by Željko Joksimović.
 Many of the songs on this album have also appeared on his "Live Koševo 2004" album released in 2005.
 The other guest appearances on the Burek album include Nina Badrić on "Ti si mene", and Edo Zanki on "Verletzt".
Skeletons & Majesties Live is the fourth live album of the metal band Gamma Ray.
 The album was recorded during Gamma Ray's 2011 concert in Pratteln (Switzerland) and contains acoustic renditions of the songs "Rebellion in Dreamland" and "Send Me a Sign" as well as the guest appearance of ex-Helloween and current Unisonic vocalist Michael Kiske on 3 tracks.
In show business, a guest appearance is the participation of an outsider performer (such as a musician or actor) in an event such as a music record or concert, show, etc., when the performer does not belong to the regular cast, band or other performing group.
 In music, such an outside performer is often referred to as a guest artist.
 In performance art, the terms guest role or guest star are also common, the latter term specifically indicating the guest appearance of a celebrity.
 The latter is often also credited as "special guest star" or "special musical guest star" by some production companies.
Live from Vatnagarðar is the first live album by the Icelandic alternative folk band Of Monsters and Men, released digitally through Republic Records worldwide on 20 September 2013.
 The album consists of six tracks from their previous album re-recorded live in studio, plus a cover of Yeah Yeah Yeahs' "Skeletons".
 Four of the re-recorded tracks are performed as they are at the group's current concerts, with the exception of "King and Lionheart" and "Little Talks", which are entirely new renditions.
 One of the new renditions, "Little Talks", was played on the band's May/June North American Tour (12 May 2013).
 "Skeletons" is a song frequently played at their concerts, making it relevant to this "live" album.
The Nashville Terminal Subdivision is a railroad line owned by CSX Transportation in the U.S. State of Tennessee.
 The Subdivision is broken up into 5 sections all in Nashville, Tennessee.
 The northern part of the Terminal is in Madison, Tennessee at milepost 000/0BA 174 on the southern end of the Ex-L&N Mainline Subdivision at Monfort.
 Disptach for the Mainline Sub is known as "LD" which is part of the Cincinnati Division.
 From here in Madison begins the double track that stays for another 22 miles south to Brentwood, Tennessee.
 At milepost 000/0BA/00H 176.6, the famous Johnny Cash "Amqui" location where the Ex-L&N Evansville, Indiana line, the Henderson Subdivision meets with the Terminal.
 Dispatch for the Henderson Sub is known as "SA" and operates on AAR58.
 There are two crossings near each other, Williams Ave and Nesbitt Lane at Amqui.
 From here the Terminal goes south about 2 miles to the Nashville National Cemetery to the first major location, known as Ekin, 000179, where there is a cross over track from number 1 to number 2 track (left to right track).
 There is also the first EDD (Defect Detector) at 000179.1.
 Few more miles southward, the next major location appears.
 At 000181.0, Maplewood is a major location for the Terminal.
 From here the regular Terminal goes south to swap crews at Kayne Ave, and the right side, Radnor Cutoff, detours the city and gives yard departures and arrivals direct access to and from Radnor yard to cities like Louisville and Chicago.
 The Cutoff runs from Maplewood to Shelby Park double track.
 From Shebly the track converges into one to pass the historic Shelby bridge, then it opens back to double track.
 From there, the cutoff hits the Intermediates at 0BA187.0 known as Chicken Pike.
 The Radnor Cutoff carries the L&N mainline classification of "0BA" but meets the main at the same milepost from the Terminal.
 At Chicken Pike, trains are staged to await arrival to Radnor yard.
 Once they get clearance, speed is decreased to 15, and at 0BA188.1 the EDD (Defect Detector) sounds for departures and arrivals.
 This location is known as North Radnor.
 The right track diverging from the #2 is known as A-1, it is for departure trains to Chattanooga and Atlanta.
 The left track which goes west from the #1 is known as A-2, and serves as a departure track to Memphis, and if the cutoff is out of service, all northbound departures.
 The interesting piece of Maplewood is the crossovers that are there to move trains from the Cutoff to the Main.
 Both lines remain double track for a while.
 The main runs south for 2 more miles until the Intermediate signals at 000183.0.
 Commonly trains will stop before Delmas Ave when Kayne Ave is at capacity and await dispatch permission before moving south.
 From here, the main continues south until the CR Cumberland River Swingbridge, where the main converges into a single track shortly to cross the bridge.
 At this point, trains had been running at track speed of around 40.
 From the drawbridge into town, speed is reduced to around 10.
 After the bridge is passed, the main returns to double track in downtown.
 On the #1 track about a half a mile south, another connecting track is present.
 This is the Wye track that connects the main with the Bruceton side, while rarely used for mainline trains, locals and river jobs use it.
 The location is known as 8th Avenue or 8th Avenue Wye.
 The main then runs down to Kayne Ave, the central hotbed of all Nashville thru traffic.
 The Memphis, Tennessee Ex-L&N Bruceton Subdivision meets with the Terminal.
 The Bruceton Sub begins at Church Street at 00N0.0.
 The line then runs single track until 00N0.7 "11th Avenue" where it turns into double track and also meets the aforementioned, Wye track.
 The Bruceton line then goes southwest a while to the next signals, at "Shops".
 Now speed has been increased.
 The line is still double track until "Sellars", where speed is increased to 40 and jurisdiction transferred to the SD Dispatcher.
 For a short time, 4 main tracks are present and an additional fifth track for switchers and yard movements.
 The tracks from left to right in Kayne Ave are as follows: 100, 99, 98, 12, 3.
 The Kayne Ave yard is also here in this area, which houses some frieght and some switcher engines.
 The tracks to the old shed are covered and removed.
 The Union Station is not an active station, but a historic hotel.
 Crew change usually occurs at the "walkway" which is under the Demombreun St bridge by the Kayne Ave Tower.
 This is also where the Ex-NC&StL Chattanooga Subdivision begins.
 Then tracks run south to Fogg St/South End where things get complicated.
 At milepost 000/0BA/00J187 the 98 track merges into the 12 track, making for 3 tracks now.
 There is a crossover from 99 to 12, also a crossover from 12 to 3.
 About 2/10ths of a mile down the 99 merges into the 12 track reducing the tracks back to the regular double.
 About 4/10ths of a mile down the line from Fogg St, 000187.4, Oak St, is a crossover track from #2 to #1 (the track names are no longer 3 and 12, but are back to regular names).
 When trains use this crossover northbound, such as Memphis bound trains from the A-2 line, they refer to it as "Long Lead".
 And now, the Terminal splits into two parts.
 The right side turns into a single track shortly, and will become the Chattanooga Subdivision, and the left side runs south to Brentwood.
 The right track runs single shortly until double track for a while.
 This begins part of the Chattanooga Sub or J-Line.
 The #2 meets with the A-2 connection track at 00J2.2 known as A-2.
 Speed is now increased to 40.
 Commonly northbounds will stage at 4th Ave on the #1 to await clearance.
 Now about a mile down the #1 meets the A-1 connection line.
 At 00J3.6 known as A-1.
 Further down the double track ends at Glencliff (00J4.9).
 Now it runs single for three miles until it hits Danley, which has the D Line connection track, which is an arrival track for incoming Radnor trains from the J Line.
 At Danley, the Terminal ends but the same dispatcher handles traffic, "SC".
 At Oak Street, our main terminal line goes south two miles to 000189.0 known as Criaghead or Vine Hill.
 There is a crossover here from #1 to #2 track.
 And there is also a connection/delivery track to the Nashville and Eastern Railroad which connects the Tennessee Central Railroad Museum to a major railroad.
 Trains sometimes stop on the #2 before Craighead if they are waiting to enter Radnor yard.
 Sometimes trains wait on the #1 at the Berry Road crossing if they await arrival to Kayne Ave. At this point, speed has been increased to 30 from 10.
 Moving south, the line hits Radnor Yard at 000192.
 The #2 track meets the E-Line arrival track which most Memphis trains and locals use.
 The B-Line which meets the #1 track is used for departures out of the C yard and local jobs.
 At Mayton, 000192.3, the B line meets the #1 track, and there is a crossover track from #2 to #1.
 Speed is now at 40.
 2 miles south, at 000194.0, South Radnor, the next intersection is present.
 This is where the Radnor A yard meets the main.
 There is a single departure/arrival track that meets the #2 track along with a crossover from #1 to #2 track.
 Commonly, the #2 track south of the signals is used to halt trains.
 This location is known as TVA, because of the power station that is adjacent.
 From here the Terminal runs about 2.5 miles south until we hit the southern tip.
 The tracks converge onto one single main, at 000/0BA196.6 known as Brentwood.
 Speed is increased to 50 and jurisdiction to the S.E. dispatcher.
 The right track is the main, S&NA North, while the left track is the Nashville Subdivision which runs to Columbia and exchanges freight with the TSRR.
 The Nashville Terminal Subdivision is one of the busiest locations on the CSX network, and one of the most important.
Michael Kiske (born January 24, 1968) is a German singer best known as the lead vocalist for the German power metal band Helloween.
 After his departure from the band, Kiske recorded four solo albums, participated on various metal and rock related projects, such as Avantasia, Place Vendome and Kiske/Somerville, while he also performed with numerous bands as a guest vocalist.
 In late 2009, he formed the hard rock / heavy metal band Unisonic and began touring again after 17 years of absence.
 On November 14, 2016 it was officially announced that Kiske will tour again with Helloween and Kai Hansen in 2017 and 2018.
Compact Jazz: The Swingle Singers is a compilation album of previously released tracks from 3 Philips Swingle Singers recordings: "Place Vendôme" (a.k.a. "Encounter") (7 tracks / complete), "Getting Romantic" (a.k.a. "Les Romantiques") (6 tracks) and "Spanish Masters" (a.k.a. "Sounds of Spain") (3 tracks).
Amy Berg grew up in Castro Valley, California, USA.
 She is an American TV writer and showrunner, known best for her work on "Counterpart", "Da Vinci's Demons", "Person of Interest", "Eureka", "Leverage", and "The 4400".
 Her other television credits include "Boomtown" and "Threshold".
 She was also a featured performer at w00tstock 3.0 during San Diego Comic Con in 2011.
 In September 2011, she made a guest appearance as herself in an episode of "Eureka" guest star Felicia Day's web series "The Guild".
 Similarly, in May 2013 she made a guest appearance as herself in an episode of "Eureka" and "Leverage" guest star Wil Wheaton's web series "TableTop".