Question: how is Barry Cogan and Teachta Dála connected?

Context articles: Alan Farrell
Barry Cowen
Kieran O'Donnell
Thomas Byrne (Meath politician)
Charlie McConalogue
Darragh O'Brien
Barry Cogan (politician)
Niall Collins
Eamon Scanlon
Teachta Dála

Alan Farrell (born 29 December 1977) is an Irish Fine Gael politician and a Teachta Dála (TD) for the Dublin Fingal constituency, upon being elected 2011 general election.
 He previously served as a Teachta Dála (TD) for the Dublin North constituency from 2011 to 2016.
 He was appointed Chair of the Committee on Children and Youth Affairs in July 2017.
 Farrell served as a Fingal County Councillor from 2004-2011 and as Mayor of Fingal in 2007/2008.
Barry Cowen is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Offaly constituency, upon being elected at the 2011 general election.
 He previously sat as a Teachta Dála (TD) for the Laois-Offaly constituency from 2011 to 2016.
Kieran O'Donnell (born 8 May 1963) is an Irish Fine Gael politician who has served as a Senator for the Cultural and Educational Panel since April 2016.
 He served as a Teachta Dála (TD) for the Limerick City constituency from 2011 to 2016.
 He sat as a Teachta Dála (TD) for the Limerick East constituency from 2007 to 2011.
Thomas Byrne (born 1 June 1977) is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Meath East constituency, upon being elected at the 2016 general election.
 He previously served as a Teachta Dála (TD) from 2007 to 2011.
 He was a Senator for the Cultural and Educational Panel 2011 to 2016.
Charles Conor McConalogue (born 4 October 1977) is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Donegal constituency, upon being elected at the 2016 general election.
 He previously sat as a Teachta Dála (TD) for the Donegal North-East constituency from 2011 to 2016.
Darragh O'Brien (born 8 July 1974) is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Dublin Fingal constituency, upon being elected at the 2016 general election.
 He previously served as Leader of the Opposition in the Seanad and Leader of Fianna Fáil in the Seanad from 2011 to 2016.
 He served as a Senator for the Labour Panel from 2011 to 2016.
 He previously served as a Teachta Dála (TD) for the Dublin North constituency from 2007 to 2011.
Barry Cogan (born 27 September 1936) is a retired Irish Fianna Fáil politician who served as a Teachta Dála (TD) for 4 years and a Senator for less than one year.
Niall James Collins (born 30 March 1973) is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Limerick County constituency, upon being elected at the 2016 general election.
 He previously sat as a Teachta Dála (TD) for the Limerick constituency from 2011 to 2016 and Limerick West from 2007 to 2011.
Eamon Scanlon (born 20 September 1954) is an Irish Fianna Fáil politician and a Teachta Dála (TD) for the Sligo–Leitrim constituency, upon being elected at the 2016 general election.
 He had previously served as a Teachta Dála for the Sligo–North Leitrim constituency from 2007 to 2011.
 He was a Senator for the Agricultural Panel from 2002 to 2007.
A TD (plural TDanna in Irish; full Irish form Teachta Dála , ] , plural "Teachtaí Dála") is a member of Dáil Éireann, the lower house of the Oireachtas (the Irish Parliament).
 It is the equivalent of terms such as "Member of Parliament" (MP) or "Member of Congress" used in other states.
 The official translation of the term is "Deputy to the Dáil", although a more literal translation is "Assembly Delegate".