Question: What is the name of Danish professional boxer, who provides vocals for a track on "A Warriors Call"?

Context paragraphs:
Starbomb: Starbomb is an American musical-comedy group composed of Dan Avidan and Brian Wecht of musical-comedy duo Ninja Sex Party together with Flash animator and Internet personality Arin Hanson.  The songs of Starbomb consist of video game parodies; Avidan provides vocals, Wecht produces instrumentals, and Hanson provides rapping vocals.  All three are also known as a part of YouTube Let's Play webseries "Game Grumps".

Wake Me Up (Avicii song): "Wake Me Up" (stylised as "WAKE ME UP!")  is a song by Swedish DJ and electronic music producer Avicii, released as the lead single from his debut studio album "True", released on CD and cassette by PRMD Music, Lava Records and Sony Music's Columbia Records on June 17, 2013.  American soul singer Aloe Blacc provides vocals for the track and Mike Einziger of Incubus provides acoustic guitar.  Avicii introduced "Wake Me Up!"  for the first time live on stage at the Ultra Music Festival in Miami.  The experimental rendering (it was accompanied by a live band with instruments and vocalists, including Blacc, Einziger and Incubus members Ben Kenney on bass and José Pasillas on drums) reportedly confused and angered a section of the electronic dance festival community.  Subsequently, Avicii achieved critical and commercial success with the release of the single worldwide.

Micki Nielsen: Micki Nielsen (born 26 February 1993) is a Danish professional boxer.  He is fighting for the german Sauerland Promotion

Mikkel Kessler: Mikkel Kessler (born 1 March 1979) is a Danish professional boxer.  He is a multiple-time super-middleweight world champion, having held the WBA title three times between 2004 and 2013, and the WBC title twice between 2006 and 2010.

Dennis Ceylan: Dennis Ceylan (born 3 March 1989, Høje Tåstrup, Denmark) is a Danish professional boxer.  He is the current EBU European featherweight champion.

A Warrior's Call: "A Warrior's Call" is a song by Danish heavy metal band Volbeat and the ninth track from their fourth studio album, "Beyond Hell/Above Heaven".  It is dedicated to former professional boxer Mikkel Kessler who provides vocals on the track.  It was released in 2011 as a single to active rock stations.  The music video was directed by Matt Wignall.  It was released in November 2011, and shows a rock concert and archive footage of Kessler.

Lolenga Mock: Lolenga Mock (born 22 April 1972) is a Danish professional boxer who held the European Union super-middleweight title three times between 2006 and 2011.  A veteran of the sport for more than 25 years, Mock is known for his toughness and has only ever been stopped once in his career.

Patrick Nielsen: Patrick Nielsen (born March 23, 1991) is a Danish professional boxer.  He is boxing for Team Sauerland and a regular headliner on Sauerland's Viasat Nordic Fight Night cards.

Lay Me Down (Avicii song): "Lay Me Down" is a song by Swedish producer Avicii.  Written by Avicii, Ash Pournouri, Nile Rodgers and Adam Lambert, the track appears on Avicii's debut studio album, "True" (2013).  American singer-songwriter Adam Lambert also provides vocals for the track, while Nile Rodgers provides guitar backing.  The track was released as the fifth single from his album on April 21, 2014.  The song is featured in a 2014 commercial for Lipton Ice Tea.  The music video shows Avicii performing the song live during his True Tour.  However, Adam Lambert and Nile Rodgers does not appear in the video.  The song is written in the key of A Minor.

Arborea (band): Arborea is an American psychedelic folk duo consisting of husband and wife Buck Curran and Shanti Curran.  Buck Curran provides vocals, guitar, slide guitar, and sawing fiddle, while Shanti Curran provides lead vocals, banjo, 'Banjimer' (a type of banjo dulcimer made by Tennessee luthier Gwen Forrester), harmonium, ukulele, sawing fiddle, and hammered dulcimer.  They share songwriting, arranging, and producing.

Supporting paragraphs: A Warrior's Call Mikkel Kessler
Answer: Mikkel Kessler