Question: Peter Head and Bon Scott were musicians of what nationality?
Context: "Back in Black" is a song by AC/DC, appearing as the first track on side two of their 1980 album of the same name.  Known for its opening guitar riff, the song was AC/DC's tribute to their former singer Bon Scott.  His replacement Brian Johnson recalled to "Mojo" magazine in 2009 that when the band asked him to write a lyric for this song, "they said, 'it can't be morbid – it has to be for Bon and it has to be a celebration.'"  He added: "I thought, 'Well no pressure there, then' (laughs).  I just wrote what came into my head, which at the time seemed like mumbo, jumbo.  'Nine lives.  Cats eyes.  Abusing every one of them and running wild.'  The boys got it though.  They saw Bon's life in that lyric."  It peaked in the U.S. at No. 37 on the "Billboard" Hot 100 chart in 1981 and was No. 51 on Billboard's Top Tracks chart, which debuted in March 1981.  "Back in Black" received the RIAA's Master Ringtone Sales Award (Gold and Platinum) in 2006 and reached 2× Platinum status in 2007. Stephen Edward Foster (born 30 September 1946), better known as Steve Foster, is an Australian singer/songwriter from Murray Bridge, South Australia.  He recorded his first solo single in 1963 while still at high school on the K-Bee Label.  His career has mostly been as a solo artist, but he has led some very successful bands as well including Inkase, Alcheringa, Head First and Limited Edition.  He was the opening act on the Brian Cadd & the Bootleg Family Australian tour 1972-1973,and performed in The Mount Lofty Rangers, which was a collection of Adelaide musicians including the late Bon Scott, before he went on to AC/DC fame.  1971 saw Foster as the only Adelaide act to play The Myponga Festival, which was Adelaide's answer to Woodstock. Ronald Belford "Bon" Scott (9 July 1946 – 19 February 1980) was an Australian singer and songwriter, best known for being the lead vocalist and lyricist of the Australian hard rock band AC/DC from 1974 until his death in 1980. Peter Head (born Peter Beagley 1946, Adelaide) is an Australian rock music pianist and singer-songwriter.  He came to prominence with Adelaide progressive rock band Headband (from February 1971 to 1974.  He then formed The Mount Lofty Rangers, which included Bon Scott (ex-Fraternity) on lead vocals.  Head also has a solo career. Clinton Walker (born 1957) is an Australian writer, best known for his works on popular music but with a broader interest in social and cultural history and theory.  Sydney's "Sun-Herald" has called him "our best chronicler of Australian grass-roots culture."  He has always been ahead of the curve.  As "Rhythms" magazine said in 2015, "Like many of Walker’s projects, "Buried Country" was at least a decade ahead of its time," and as such he is remarkable as a critic who has exerted a pro-active impact on Australian music and its development; groundbreaking books like "Inner City Sound" (1981) and "Buried Country" (2000) especially have informed and inspired successive generations of musicians.  Similarly, while he found best-selling success as Bon Scott's biographer, Walker's non-music books like "Football Life" (1998) and "Golden Miles" (2005) have innovatively offered an appreciation of subjects hitherto hardly deemed worthy of serious consideration. Siège social (French, usually translated Head Office) is a concept in international law for determining the nationality of companies.  It is essentially based on effective nationality as opposed to “paper nationality”.  The paper nationality is where the company has been incorporated, but the effective nationality requires a genuine link to the corporate activity.  It describes the nationality based on the location of the actual activity of the corporation through where the owners are or the actual business is done. In The Key Of Night is a solo piano/voice album by Australian pianist Peter Head.  It was released in 2004 and was recorded to capture the classic feel of Head's late night piano bar shows, at the request of Big Beat Music.  It features Head's interpretation of songs by Ray Charles, Tom Waits, Randy Newman and Gram Parsons, alongside his original tunes. "Touch Too Much" is the fourth track on AC/DC's 1979 album "Highway to Hell", their last with lead vocalist Bon Scott, who died the following year.  The song was performed by Scott and AC/DC on BBC music show "Top of the Pops" 12 days before his death.  This episode, dated 7 February 1980, was repeated by BBC Four on 19 February 2015, the 35th anniversary of Scott's death. Headband were a progressive, blues rock band formed in Adelaide in February 1971 by bass guitarist Chris Bailey; drummer Joff Bateman; singer-songwriter and keyboardist Peter Beagley (later known as Peter Head); and singer-songwriter and guitarist Mauri Berg.  The group supported Elton John (in 1971), The Rolling Stones (in 1973) at their Sydney performances.  The band finished third in the 1972 Hoadley's Battle of the Sounds – a national performance competition between the best groups representing each state.  Headband released an album, "A Song for Tooley" (September 1973) and four singles before disbanding in 1974.  Bailey later joined The Angels and then GANGgajang, Berg joined Fraternity (with Jimmy Barnes on vocals) and Head formed Mount Lofty Rangers (which included future AC/DC vocalist Bon Scott) and later went solo. Dirty Deeds Done Dirt Cheap is an album by Australian hard rock band AC/DC.  It was the band's third LP released in Australia and in Europe in 1976 but was not released in the US until 1981, more than one year after Bon Scott's death.  All songs were written by Angus Young, Malcolm Young and Bon Scott.
Answer: Australian