Question: Sort Sol and Midnight Oil are both what type of bands?
Context: Under en sort sol is the second album by the Danish rock band Sods, later known as Sort Sol.  The album was recorded over two days in 1980 and released the same year.  With this album, the group moved away from the punchy 1-2-3-4 punk, and into more experimental post-punk.  To mark the change the band name was not written anywhere on the cover. "Read About It" is the second single released by Australian rock band, Midnight Oil, from their 1982 studio album, "10, 9, 8, 7, 6, 5, 4, 3, 2, 1".  It was a favorite with the band and with fans, appearing at least once on every tour since its release and appearing at the WaveAid concert.  Very few other Midnight Oil songs have appeared so often (only "Power and the Passion", "Beds Are Burning", "The Dead Heart", and "Say Your Prayers" are "known" to have been performed so often). 20,000 Watt R.S.L. is a compilation album by Australian rock band Midnight Oil released in October 1997 on their own label Sprint Music.  The word "Collection" appears on the front of the CD along the hinge in the same type face as the title and the name of the band and may have been intended as part of the album's title; however, it does not appear on the spine.  The release has also been distributed inside a cardboard sleeve which adds "Midnight Oil: The Hits" to the album art, distinguishing it as a compilation album. Unspoiled Monsters is the seventh album by the Danish alternative rock act Sort Sol and the fifth after the renaming of the band from the earlier Sods.  It is the first without the original member Peter Peter, as he left the band before pre-production of the album.  The album is a departure from Sort Sol's earlier albums, being less aggressive and much more experimental, incorporating programmed beats and greater amount of keyboards.  The songs are less melodic and more based on atmosphere. The Power & The Passion ... a tribute to Midnight Oil is a 2001 tribute album featuring thirteen mostly Australian bands and artists, covering songs by the prominent Australian rock band Midnight Oil. Sort Sol is a pioneer rock band from Copenhagen, Denmark.  The band was formed in 1977 as a punk rock outfit, originally under the name Sods (stylized as SODS).  The name "Sort Sol" was taken in the early 1980s.  It translates to English as "black sun" and is named after Midnight Oil (also known informally as "The Oils" to fans) are an Australian rock band, who originally performed as Farm from 1972 with drummer Rob Hirst, bass guitarist Andrew James and keyboard player/lead guitarist Jim Moginie.  While vocalist Peter Garrett was studying at Australian National University in Canberra, he answered an advertisement for a spot in Farm, and by 1975 the band was touring the east coast of Australia.  By late 1976, Garrett moved to Sydney to complete his law degree, and Farm changed its name to Midnight Oil by drawing the name out of a hat. Robert George "Rob" Hirst (born 3 September 1955) is an Australian musician from Camden, New South Wales.  He is a founding member of rock band Midnight Oil on drums, percussion and backing vocals (sometimes lead vocals) from the 1970s until the band's took a hiatus in 2002.  He also wrote a book, "Willie's Bar & Grill", recounting the experiences on the tour Midnight Oil embarked on shortly after the 11 September terrorist attacks in 2001. Flow My Firetear is the fifth album by the Danish rock act Sort Sol known earlier as Sods, and the third after the renaming.  It was released in March 1991.  The album was the band's first commercial success and included the hits "Siggimund Blue" and "Midnight Train To Summer". Dagger & Guitar is the 1983 third album by the Danish rock band Sort Sol (previously Sods) and the first of their records to carry the new name Sort Sol.
Answer: rock band