Question: James Martin Pacelli McGuinness, was an Irish republican and Sinn Féin politician who from May 2007 to January 2017, who had a titled partial position, are the joint heads of the Northern Ireland Executive and have overall responsibility for the running of the Executive Office?

Context articles: Republican Sinn Féin
St Andrews Agreement
Martin McGuinness
Joe Cahill
Martina Anderson
First Minister and deputy First Minister
Executive Office (Northern Ireland)
Republican News
Paul Maskey
Samuel O'Flaherty

Republican Sinn Féin or RSF (Irish: "Sinn Féin Poblachtach" ) is an Irish republican political party in Ireland.
 RSF claims to be heirs of the Sinn Féin party founded in 1905 and took its present form in 1986 following a split in Sinn Féin.
 RSF members take seats when elected to local Irish councils but do not recognise the validity of the partition of Ireland and subsequently the legitimacy of the Northern Ireland (Stormont) or Republic of Ireland (Leinster House) parliaments, so the party does not register itself with them.
The St Andrews Agreement (Irish: "Comhaontú Chill Rímhinn" ; Ulster Scots: "St Andra's 'Greement", "St Andrew's Greeance" or "St Andrae's Greeance") was an agreement between the British and Irish governments and Northern Ireland's political parties in relation to the devolution of power in the region.
 The agreement resulted from multi-party talks held in St Andrews in Fife, Scotland, from 11 to 13 October 2006, between the two governments and all the major parties in Northern Ireland, including the two largest, the Democratic Unionist Party (DUP) and Sinn Féin.
 It resulted in the restoration of the Northern Ireland Assembly, the formation (on 8 May 2007) of a new Northern Ireland Executive and a decision by Sinn Féin to support the Police Service of Northern Ireland, courts and rule of law.
James Martin Pacelli McGuinness (Irish: "Séamus Máirtín Pacelli Mag Aonghusa" ; 23 May 1950 – 21 March 2017) was an Irish republican and Sinn Féin politician who was the deputy First Minister of Northern Ireland from May 2007 to January 2017.
Joe Cahill (Irish: Seosamh Ó Cathail ; 19 May 1920 – 23 July 2004) was a prominent figure in the Irish Republican movement in Northern Ireland and former chief of staff of the Provisional Irish Republican Army (IRA).
 He joined a junior-republican movement, Na Fianna Eireann, in 1937 and the following year, joined the Irish Republican Army.
 In 1969, Cahill was a key figure in the founding of the Provisional Irish Republican Army.
 During his time in the Provisional IRA, Cahill helped import weapons and raise financial support.
 He served as the chief of staff in 1972, but was arrested the following year when a ship importing weapons was intercepted.
 After his release, he continued to serve on the IRA Army Council and lead all financial dealings for Sinn Féin.
 In the 1990s, the IRA and Sinn Féin began to work on seeking peace.
 Cahill served on the council that called a cessation on 21 July 1996.
 Cahill attended several of the talks that finally led to the Good Friday Agreement on 10 April 1998.
 Shortly after the agreement was made, Cahill resigned as treasurer of Sinn Féin.
 To honour his service, he was made honorary Sinn Féin Vice-President for life.
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.
The First Minister and deputy First Minister are the joint heads of the Northern Ireland Executive and have overall responsibility for the running of the Executive Office.
The Executive Office is a devolved Northern Ireland government department in the Northern Ireland Executive with overall responsibility for the running of the Executive.
 The Ministers with overall responsibility for the department are the First Minister and deputy First Minister.
Republican News was a longstanding newspaper/magazine published by Sinn Féin.
 Following the split in physical force Irish republicanism in the late 1960s between the "Officials" (Official Sinn Féin — also known as Sinn Féin Gardiner Place — and the Official IRA) and the "Provisionals" (Provisional Sinn Féin — also known as Sinn Féin Kevin Street and now most commonly simply as Sinn Féin — and the Provisional IRA) "Republican News" was eclipsed by "An Phoblacht", a new magazine launched by Provisional Sinn Féin in 1970.
 "An Phoblacht" came first and then in early 1970, Joe Graham and Proinsias Mac Airt put together "The Republican News" and it functioned independently for quite a while.
 Graham worked on only three issues of it before starting "The Vindicator".
 The magazines merged under the name "An Phoblacht/Republican News" in 1979.
Paul John Maskey (born 10 June 1967) is an Irish republican politician in Northern Ireland who is a member of Sinn Féin.
 He served as a Sinn Féin member (MLA) of the Northern Ireland Assembly for Belfast West from 2007 to 2012.
 He is currently Member of Parliament (MP) for the Westminster constituency of Belfast West, but in line with Sinn Féin's policy of abstentionism he has not taken his seat there.
Samuel O'Flaherty (died 22 May 1930) was an Irish Sinn Féin politician.
 He first stood for election at the 1918 general election as a Sinn Féin candidate for the Donegal East constituency but was defeated by Edward Kelly of the Irish Parliamentary Party.
 He was elected unopposed as a Sinn Féin Teachta Dála (TD) to the 2nd Dáil at the 1921 elections for the Donegal constituency.
 He opposed the Anglo-Irish Treaty and voted against it.
 He was re-elected unopposed as an anti-Treaty Sinn Féin TD at the 1922 general election but did not take his seat.
 He lost his seat at the 1923 general election.