Question: The Miami Showband was part of a killing that was perpetrated by what group?

Context paragraphs:
The Miami Showband: The Miami Showband were one of the most successful and popular showbands in Ireland in the 1960s and 1970s.  Led at first by singer Dickie Rock, and later by Fran O'Toole, they had seven number one records on the Irish singles chart.  In 1975 during The Troubles, when returning from a performance in County Down, Northern Ireland, three members of the band, Fran O'Toole, Tony Geraghty, and Brian McCoy, were killed in what became known as the "Miami Showband massacre".

Brian Dunphy: Brian Dunphy (born 17 June 1974, Dublin, Ireland) is an Irish folk singer and son of the famous showband singer Sean Dunphy, who represented Ireland at the Eurovision Song Contest in 1967.  A well-known performer and member of the Irish folk band The High Kings, Brian Dunphy has toured the United States, Ireland and the United Kingdom.  He got his start as the lead singer in "Riverdance: The Show", which ran on Broadway in New York City.  He also joined the Three Irish Tenors, who toured throughout the United States, and was also part of the band Druid.  He released a solo album entitled, "Timeless", as well in 2005.  Dunphy has most recently been a member of the four-person Irish folk band The High Kings (2008–present), along with Finbarr Clancy, Martin Furey and Darren Holden.  The High Kings have released six albums and toured extensively in the United States, Europe and Australia.  Dunphy typically plays the bodhrán and the guitar in the group.

Walter Blume (SS officer): Walter Blume (23 July 1906 – 13 November 1974) was a mid-ranking SS commander and leader of "Sonderkommando" 7a, part of the extermination commando group Einsatzgruppe B.  The unit perpetrated the killings of thousands of Jews in Belarus and Russia.  Blume was responsible for the deportation of over 46,000 Greek Jews to Auschwitz.

Balad al-Shaykh massacre: Balad al-Shaykh was a Palestinian Arab village, now part of the Israeli town of Nesher where a massacre was perpetrated on the night of December 31, 1947, to January 1, 1948.  The Palmach, an arm of the Haganah, attacked the town while the residents were asleep, firing from the slopes of Mount Carmel, in retaliation for the killing of 39 Jews during the Haifa Oil Refinery massacre the day before, 30 December 1947, which itself was triggered by the attack of the Zionist paramilitary group, the Irgun, who threw a number of grenades at a crowd of 100 Arab day laborers who had gathered outside the main gate of the British-owned Haifa Oil refinery looking for work, resulting in 6 deaths and 42 wounded.  The Jewish agency condemned the Irgun for the "act of madness" that preceded the killing of Jewish workers at the Haifa oil refinery but at the same time authorized the raid on Balad al-Shaykh.

Harris Boyle: Harris Boyle (1953 – 31 July 1975) was an Ulster Defence Regiment (UDR) soldier and a high-ranking member of the Ulster Volunteer Force (UVF), a Northern Irish loyalist paramilitary organisation.  Boyle was implicated in the 1974 Dublin and Monaghan bombings, and took part in the attack at Buskhill, County Down when an armed UVF gang wearing British Army uniforms ambushed The Miami Showband at a bogus military checkpoint.  The popular Irish cabaret band was driving home to Dublin after a performance in Banbridge.  He was one of the two gunmen killed when the bomb they had loaded onto the band's minibus exploded prematurely.  He is sometimes referred to as Horace Boyle.

Assassination of Orlando Letelier: The assassination of Orlando Letelier refers to the September 21, 1976 car bombing, in Washington, D.C., of Orlando Letelier, a leading opponent of Chilean dictator Gen. Augusto Pinochet.  Letelier, who was living in exile in the United States, was killed along with Ronni Karpen Moffitt, who was in the car along with her husband Michael, who worked for Letelier.  The assassination was perpetrated by agents of the Chilean secret police (the DINA), and was one among many carried out as part of Operation Condor.  Declassified U.S. intelligence documents confirm that Pinochet directly ordered the killing.

UVF Mid-Ulster Brigade: UVF Mid-Ulster Brigade formed part of the loyalist paramilitary Ulster Volunteer Force in Northern Ireland.  The brigade was established in Lurgan, County Armagh in 1972 by its first commander Billy Hanna.  The unit operated mainly around the Lurgan and Portadown areas.  Subsequent leaders of the brigade were Robin Jackson, known as "The Jackal", and Billy Wright.  The Mid-Ulster Brigade carried out many attacks, mainly in Northern Ireland, especially in the South Armagh area, but it also extended its operational reach into the Republic of Ireland.  Two of the most notorious attacks in the history of the Troubles were carried out by the Mid-Ulster Brigade: the 1974 Dublin and Monaghan bombings and the Miami Showband killings in 1975.  Members of the Mid-Ulster Brigade were part of the Glenanne gang which the Pat Finucane Centre has since linked to at least 87 lethal attacks in the 1970s.

Love of the Common People: "Love of the Common People" is a song written by John Hurley and Ronnie Wilkins, eventually released in 1970 on John Hurley's album "John Hurley Sings about People," but first sung in January 1967 by The Four Preps.  It had been covered by The Everly Brothers, country singers Waylon Jennings and Lynn Anderson, Pennsylvania Sixpence and also Wayne Newton, all in 1967, The Simple Image, Leonard Nimoy, reggae singer Eric Donaldson and the Gosdin Brothers in 1968, Elton John and also soul group The Winstons, both in 1969, John Denver on his 1969 album "Rhymes & Reasons," Sandy Posey in 1970, the same year that reggae singer Nicky Thomas had a big hit in Europe with the song, and pedal steel guitarist Sneaky Pete Kleinow in 1979.  It was also a Top 10 hit in Ireland for showband star Joe Dolan in 1968.  Wanda Jackson covered the song in 1971, as did Stiff Little Fingers and English pop singer Paul Young, both in 1982.  In 2007 Bruce Springsteen covered it as part of his Seeger Sessions tour, releasing a live version of it as a bonus track on his "" album.

Wesley Somerville: William Wesley Somerville (c. 1941 – 31 July 1975) was a Northern Irish loyalist, who held the rank of lieutenant in the illegal Ulster Volunteer Force's (UVF) Mid-Ulster Brigade during the period of conflict known as "the Troubles".  He also served as a member of the British state's legal Ulster Defence Regiment (UDR).  Somerville was part of the UVF unit that ambushed the Irish cabaret band The Miami Showband at Buskhill, County Down, which resulted in the deaths of three of the bandmembers.  Somerville was killed, along with Harris Boyle, when the bomb they had loaded onto the band's minibus exploded prematurely.  His brother, John James Somerville (a former UDR soldier) was one of the three men convicted of the murders of bandmembers Brian McCoy, Fran O'Toole and Tony Geraghty.

Miami Showband killings: The Miami Showband killings (also called the Miami Showband Massacre) was an attack by the Ulster Volunteer Force (UVF), a loyalist paramilitary group, on 31 July 1975.  It took place on the A1 road at Buskhill in County Down, Northern Ireland.  Five people were killed, including three members of The Miami Showband, who were then one of Ireland's most popular cabaret bands.

Supporting paragraphs: The Miami Showband Miami Showband killings
Answer: Ulster Volunteer Force