Question: The Greysteel massacre was the killing of 8 people in a County Londonderry pub in October of which year?

full_context: Document 1: The Troubles in Magherafelt: A total of eleven people were killed in violence relating to the Northern Irish Troubles in the town of Magherafelt, County Londonderry. Nine were killed by the Irish Republican Army (IRA), including three IRA members killed by the premature explosion of their own bomb while travelling through Magherafelt. One was killed by a non-specific republican group and another by the opposing Ulster Freedom Fighters (UFF). Of the others killed by the IRA, four were Protestant civilians. Three of them were killed in two separate car bomb explosions. The fourth Protestant civilian was shot because his firm was a contractor for the British Army and the Royal Ulster Constabulary (RUC). The IRA's other two victims were both Protestant members of the security forces, one from the RUC and the other from the Ulster Defence Regiment. Both were off duty when killed. The man killed by the UFF was a Sinn Féin councillor who was shot in his workplace. The man killed by the non-specific republican group was a Catholic civilian.
Document 2: Bloody Sunday (1921): Bloody Sunday or Belfast's Bloody Sunday was a day of violence in Belfast, Ireland (present-day Northern Ireland) on 10 July 1921, during the Irish War of Independence. In retaliation for an Irish Republican Army (IRA) ambush of a police raiding party, Protestant loyalists attacked Catholic enclaves, burning homes and businesses. This sparked gun battles between republican and loyalist paramilitaries, and street fighting between Catholics and Protestants. There was also shooting between republicans and police, and it is claimed that some police patrols fired indiscriminately at Catholic civilians. Seventeen people were killed on 10 July, and a further eleven were killed or fatally wounded over the following week. At least 100 people were injured. About 200 houses were badly damaged or destroyed, leaving 1,000 people homeless. The violence took place just before a truce came into effect, which ended the war in most of Ireland.
Document 3: Torrens Knight: Torrens Knight (born 4 August 1969) is a Northern Ireland loyalist, who belonged to the North Antrim and Londonderry Brigade of the Ulster Defence Association (UDA). In 1993 he took part in the Greysteel massacre (in which eight civilians were shot dead) and the Castlerock killings (in which three civilians and a Provisional Irish Republican Army (IRA) member were killed). After being convicted—along with three others—for the killings, he served seven years in the Maze Prison before his release in 2000 under the terms of the Belfast Agreement.
Document 4: Greysteel massacre: The Greysteel massacre was a mass shooting that happened on the evening of 30 October 1993 in Greysteel, County Londonderry, Northern Ireland. Three members of the Ulster Defence Association (UDA), a loyalist paramilitary group, opened fire in a crowded pub during a Halloween party, killing eight civilians and wounding thirteen. The pub was in an Irish Catholic and Irish nationalist area. The group claimed responsibility using their cover name "Ulster Freedom Fighters" and said that the attack was revenge for the Shankill Road bombing by the Provisional IRA a week earlier.
Document 5: Donnelly's Bar and Kay's Tavern attacks: On 19 December 1975, two coordinated attacks were carried out by the Ulster Volunteer Force (UVF) in pubs either side of the Irish border. The first attack, a car bombing took place outside Kay's Tavern, a pub in Dundalk in the Republic of Ireland close to the border. The second attack, a gun and bomb attack, took place at Donnelly's Bar & Filling Station in Silverbridge, County Armagh just across the border inside Northern Ireland. The attack has been linked to the Glenanne gang, a group of Loyalist militants who were either members of the UVF, the Ulster Defence Regiment (UDR), the Royal Ulster Constabulary (RUC) and the closely linked UVF paramilitary the Red Hand Commando (RHC), some of the Glenanne gang were members of the two of these organizations at the same time like gang leaders Billy Hanna who was in both the UVF and the UDR and who fought for the British Army during the Korean War and John Weir (loyalist) who was in the UVF and was a Sergeant in the RUC. At least 25 British soldiers and police officers were named as members of the gang.
Document 6: The Troubles in Limavady: Four people were killed in violence relating to the Northern Ireland Troubles in the town of Limavady, County Londonderry. All were Protestants, and all were killed by the Provisional Irish Republican Army (PIRA, better known as the IRA). One was a prison officer and one was a Royal Ulster Constabulary (RUC) officer. The other two victims were civilians killed by a van bomb explosion outside the Limavady RUC base on 28 March 1972. They were driving past at the time of the attack.
Document 7: McGurk's Bar bombing: On 4 December 1971, the Ulster Volunteer Force (UVF), an Ulster loyalist paramilitary group, detonated a bomb at McGurk's Bar in Belfast, Northern Ireland. The pub was frequented by Irish Catholics/nationalists. The explosion caused the building to collapse, killing fifteen Catholic civilians—including two children—and wounding seventeen more. It was the deadliest attack in Belfast during the Troubles.
Document 8: Shankill Butchers: The Shankill Butchers was an Ulster loyalist gang—many of whom were members of the Ulster Volunteer Force (UVF)—that was active between 1975 and 1982 in Belfast, Northern Ireland. It was based in the Shankill area and was responsible for the deaths of at least 23 people, most of whom were killed in sectarian attacks. The gang was notorious for kidnapping and murdering random Catholic and suspected Catholic civilians; each was beaten ferociously and had his throat hacked with a butcher's knife. Some were also tortured and attacked with a hatchet. The gang also killed six Ulster Protestants over personal disputes, and two other Protestants mistaken for Catholics. Most of the gang were eventually caught and, in February 1979, received the longest combined prison sentences in United Kingdom legal history. However, gang leader Lenny Murphy and his two chief "lieutenants" escaped prosecution. Murphy was killed in November 1982 by the Provisional IRA, likely acting with loyalist paramilitaries who perceived him as a threat. The Butchers brought a new level of paramilitary violence to a country already hardened by death and destruction. The judge who oversaw the 1979 trial described their crimes as "a lasting monument to blind sectarian bigotry".
Document 9: 1994 Shankill Road killings: The 1994 Shankill Road killings took place on 16 June 1994. The Irish National Liberation Army (INLA) shot dead three Ulster Volunteer Force (UVF) members – high-ranking member Trevor King, Colin Craig and David Hamilton – on the Shankill Road in Belfast, close to the UVF HQ.The following day, the UVF launched two 'retaliatory' attacks. In the first, UVF members shot dead a Catholic civilian taxi driver in Carrickfergus. In the second, they shot dead two Protestant civilians in Newtownabbey, whom they believed were Catholics. The Loughinisland massacre, two days later, is believed to have been a further retaliation.
Document 10: Bloody Sunday (1972): Bloody Sunday – sometimes called the Bogside Massacre – was an incident on 30 January 1972 in the Bogside area of Derry, Northern Ireland, when British soldiers shot 28 unarmed civilians during a peaceful protest march against internment. Fourteen people died: thirteen were killed outright, while the death of another man four months later was attributed to his injuries. Many of the victims were shot while fleeing from the soldiers and some were shot while trying to help the wounded. Other protesters were injured by rubber bullets or batons, and two were run down by army vehicles. The march had been organised by the Northern Ireland Civil Rights Association (NICRA). The soldiers involved were members of the 1st Battalion, Parachute Regiment, also known as "1 Para".
Document 11: 1997 Coalisland attack: On the evening of 26 March 1997, the Provisional IRA East Tyrone Brigade launched an improvised grenade attack on the fortified Royal Ulster Constabulary/British Army base in Coalisland, County Tyrone, Northern Ireland. The blast sparked an immediate reaction by an undercover Special Air Service unit, who shot and wounded Gareth Doris, an Irish republican and alleged IRA volunteer. The SAS unit was then surrounded by a crowd of protesters who prevented them approaching Doris or leaving. RUC officers arrived and fired plastic bullets at the crowd, allowing the special forces to leave the area.
Document 12: Ulster Defence Association: The Ulster Defence Association (abbreviated UDA) is the largest Ulster loyalist paramilitary and vigilante group in Northern Ireland. It was formed in September 1971 and undertook a campaign of almost twenty-four years during the Troubles. For most of this time it was a legal organisation. Its declared goal was to defend Ulster Protestant loyalist areas and to combat Irish republicanism, particularly the Provisional Irish Republican Army (IRA). In the 1970s, uniformed UDA members openly patrolled these areas armed with batons and held large marches and rallies. Within the UDA was a group tasked with launching paramilitary attacks; it used the covername Ulster Freedom Fighters (UFF) so that the UDA would not be outlawed. The British government outlawed the "UFF" in November 1973, but the UDA itself was not proscribed as a terrorist group until August 1992.
Document 13: Michael Stone (loyalist): Michael Stone (born 2 April 1955) is an Ulster loyalist who was a volunteer in the Ulster Defence Association (UDA). Stone was born in England but raised in the Braniel estate in East Belfast, Northern Ireland. Convicted of murdering three people and injuring more than 60 in an attack on mourners at Milltown Cemetery in 1988, he was sentenced to life imprisonment. While in jail, he became one of the leaders of the Ulster Defence Association/Ulster Freedom Fighters (UDA/UFF) prisoners.
Document 14: Milltown Cemetery attack: The Milltown Cemetery attack (also known as the Milltown Cemetery killings or Milltown Massacre) took place on 16 March 1988 in Belfast's Milltown Cemetery. During the funeral of three Provisional IRA volunteers killed in Gibraltar, an Ulster Defence Association (UDA) volunteer, Michael Stone, attacked the mourners with hand grenades and pistols. As Stone then ran towards the nearby motorway, a large crowd began chasing him and he continued shooting and throwing grenades. Some of them caught him and began beating him, but he was rescued by the police and arrested. Three people had been killed and more than 60 wounded. The "unprecedented, one-man attack" was filmed by television news crews and caused shock around the world.
Document 15: New Lodge Six shooting: In the late hours of 3 February and the early hours of 4 February 1973, six men, all of whom were Catholics, were shot and killed in the New Lodge area of north Belfast, four (one IRA member and three civilians) of them were shot dead at the junction at Edlingham Street by British Army snipers, the other two men were shot dead by the Ulster Defence Association (UDA). Irish Nationalists and Republicans believe that collusion took place between the British security forces and Loyalist paramilitaries in the shootings. The six men who were killed became known as "The New Lodge Six".
ground_truth: 1993