Question:  Seán Mackin had been a member of the Irish National Liberation Army, an Irish republican socialist paramilitary group formed during what year?

full_context: Document 1: Dolours Price: Dolours Price (21 June 1951 – 23 January 2013) was, along with her younger sister Marian, a Provisional Irish Republican Army (IRA) volunteer. She was also a political activist who became a staunch critic of Gerry Adams' leadership of Sinn Féin.
Document 2: Irish Socialist Network: The Irish Socialist Network (ISN) is a democratic socialist organisation formed in 2001. It is a campaigning organisation which works actively to fight for the rights of Irish workers and to help build a socialist Ireland. It is based in Belfast and Dublin. Politically, the ISN locates itself within the Marxist tradition, but it rejects both Leninism and Trotskyism, partly because of its opposition to democratic centralist organisational structures and to the concept of the vanguard party, which it deems elitist. Most of the founding members were former members of the Workers' Party, some being involved in the Official Republican Movement split in the late 1990s.
Document 3: Irish People's Liberation Organisation: The Irish People's Liberation Organisation was a small Irish republican paramilitary organisation which was formed in 1986 by disaffected and expelled members of the Irish National Liberation Army (INLA) whose factions coalesced in the aftermath of the supergrass trials. It developed a reputation for intra-republican and sectarian violence and criminality, before being forcibly disbanded by the Provisional Irish Republican Army (IRA) in 1992.
Document 4: 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 5: Seán Mackin (Irish republican): Seán Mackin is an Irish republican from Belfast, Northern Ireland and a fundraiser for the Friends of Sinn Féin (FOSF). Mackin, who had been a member of the Irish National Liberation Army, left Belfast with his family and applied for political asylum in the United States, alleging harassment and threats from the security forces. Mackin was also under threat from a murderous internal feud within the INLA. Immigration Judge Annette Elstein granted Mackin's wife and daughter Philomena and Jennifer political asylum in 1991. Seán Mackin was not granted asylum (as is sometimes misreported) but was granted "suspension of deportation," a different (and, ironically, faster) route to permanent residency and U.S. citizenship. The Mackins also have two sons, Seán Óg and Kieran, who are both United States citizens by birth. The entire family have since become United States citizens. In 2004, Mackin was detained by police while visiting Belfast, which was interpreted by many as an attempt to disrupt or discredit Mackin's work for FOSF.
Document 6: Paul Magee: Paul "Dingus" Magee (born 30 January 1948) is a former active service volunteer in the Belfast Brigade of the Provisional Irish Republican Army who escaped during his 1981 trial for killing a member of the Special Air Service (SAS) in 1980. After serving a prison sentence in the Republic of Ireland, Magee fled to England where he was imprisoned after killing a policeman in 1992. He migrated to the Republic of Ireland as part of the "Northern Ireland peace process" before being released from prison in 1999, and subsequently avoided extradition back to Northern Ireland to serve his sentence for killing the member of the SAS.
Document 7: Official Irish Republican Army: The Official Irish Republican Army or Official IRA (OIRA) was an Irish republican paramilitary group whose goal was to remove Northern Ireland from the United Kingdom and create a "workers' republic" encompassing all of Ireland. It emerged in December 1969, shortly after the beginning of the Troubles, when the Irish Republican Army split into two factions. The other was the Provisional IRA. Each continued to call itself simply "the IRA" and rejected the other's legitimacy. Unlike the "Provisionals", the "Officials" were Marxist and worked to form a united front with other Irish communist groups, named the Irish National Liberation Front (NLF). The Officials were called the NLF by the Provisionals and were sometimes nicknamed the "Red IRA" by others.
Document 8: Provisional Irish Republican Army: The Provisional Irish Republican Army (Provisional IRA) was an Irish republican paramilitary organization that sought to remove Northern Ireland from the United Kingdom and to bring about an independent socialist republic encompassing all of Ireland. It was the biggest and most active republican paramilitary group during the Troubles. It saw itself as the successor to the original IRA and called itself simply the Irish Republican Army (IRA), or "Óglaigh na hÉireann" in Irish, and was widely referred to as such by others.
Document 9: Republican plot: In Ireland, a republican plot is a cemetery plot where combatants or members of various Irish republican organisations are buried in a group of adjacent graves, rather than being buried with family members. These plots often hold the bodies of casualties of earlier 19th and 20th-century campaigns by organisations such as the Fenians or the IRA. This is generally with the approval of families, although in some cases such as that of Frank Stagg, there was a dispute between family members, who wished to have the body buried in a family plot, and members of the IRA and other republican organisations.
Document 10: Irish Republican Army: The Irish Republican Army (IRA) is any of several armed movements in Ireland in the 20th and 21st centuries dedicated to Irish republicanism, the belief that all of Ireland should be an independent republic. It was also characterised by the belief that political violence was necessary to achieve that goal.
Document 11: Martina Anderson: Martina Anderson (born 16 April 1962) is an Irish politician in Northern Ireland who is a Member of the European Parliament (MEP) representing Northern Ireland for Sinn Féin. She became involved in the Irish Republican movement in the late 1970s, is a former volunteer of the Provisional Irish Republican Army (IRA) and was in prison for IRA activity for 13 years until she was released as a condition of the Good Friday Agreement. After her release, she became involved in politics for Sinn Féin. She was a Member of the Legislative Assembly of Northern Ireland from 2007 to 2012, representing Foyle. She served in the Northern Ireland Executive as a Junior Minister at the Office of the First Minister and Deputy First Minister from 2011 to 2012. In 2012 she became a Member of the European Parliament, and she was reelected in the 2014 election.
Document 12: Irish National Liberation Army: The Irish National Liberation Army (INLA, Irish: "Arm Saoirse Náisiúnta na hÉireann" ) is an Irish republican socialist paramilitary group formed in December 1974, during "the Troubles". It seeks to remove Northern Ireland from the United Kingdom and create a socialist republic encompassing all of Ireland. It is the paramilitary wing of the Irish Republican Socialist Party (IRSP).
Document 13: Dissident republican: Dissident republicans, renegade republicans, anti-Agreement republicans or anti-ceasefire republicans (Irish: "poblachtach easaontach" ) are Irish republicans who do not support the current peace agreements in Northern Ireland. The agreements followed a 30-year conflict known as the Troubles, which claimed over 3,500 lives. During the conflict, republican paramilitary groups such as the Provisional Irish Republican Army waged a campaign to bring about a united Irish republic. Peace negotiations in the 1990s led to an IRA ceasefire in 1994 and to the Good Friday Agreement of 1998. Mainstream republicans, represented by Sinn Féin, supported the Agreement as a means of achieving Irish unity peacefully. 'Dissidents' saw this as an abandonment of republican ideals and acceptance of partition and British rule. They hold that the Northern Ireland Assembly and Police Service of Northern Ireland (PSNI) are illegitimate and see the PSNI as a "British paramilitary police force".
Document 14: Irish Republican Socialist Party: The Irish Republican Socialist Party or IRSP (Irish: "Páirtí Poblachtach Sóisialach na hÉireann" ) is a republican socialist party active in Ireland. It is often referred to as the "political wing" of the Irish National Liberation Army (INLA) paramilitary group. and claims the legacy of socialist revolutionary James Connolly, who founded the Irish Socialist Republican Party in 1896 and was executed after the Easter Rising of 1916.
Document 15: Malachy Carey: Malachy Carey was a volunteer in the Provisional Irish Republican Army and a Sinn Féin candidate in local government elections. He was born in Loughgiel, County Antrim in 1956 to an old County Antrim family. He was assassinated by a Loyalist death squad in Ballymoney, County Antrim. on 12 December 1992. His death was reported in Republican newspaper An Phoblacht. A Sinn Féin Cumann (local branch of Sinn Féin) has been named in his honour.
ground_truth: 1974