What is Jack Lynch?
{{Infobox officeholder | name = Jack Lynch | image = Jack Lynch 1967 (cropped).jpg | caption = Lynch in 1967 | order = 5th | office = Taoiseach | president = [[Patrick Hillery]] | 1namedata = [[George Colley]] | 1blankname = [[Tánaiste]] | term_start = 5 July 1977 | term_end = 11 December 1979 | predecessor = [[Liam Cosgrave]] | successor = [[Charles Haughey]] | president1 = [[Éamon de Valera]] | 1namedata1 = {{Ubl|[[Frank Aiken]]|[[Erskine H. Childers]]}} | 1blankname1 = [[Tánaiste]] | term_start1 = 10 November 1966 | term_end1 = 14 March 1973 | predecessor1 = [[Seán Lemass]] | successor1 = Liam Cosgrave | office2 = [[List of Irish Leaders of the Opposition|Leader of the Opposition]] | president2 = Éamon de Valera<br>Erskine H. Childers<br>[[Cearbhall Ó Dálaigh]]<br>Patrick Hillery | taoiseach2 = Liam Cosgrave | term_start2 = 14 March 1973 | term_end2 = 5 July 1977 | predecessor2 = Liam Cosgrave | successor2 = [[Garret FitzGerald]] | office3 = [[Leader of Fianna Fáil]] | deputy3 = [[Joseph Brennan (Fianna Fáil politician)|Joseph Brennan]]<br>George Colley | term_start3 = 10 November 1966 | term_end3 = 7 December 1979 | predecessor3 = Seán Lemass | successor3 = Charles Haughey | office4 = [[Minister for Finance (Ireland)|Minister for Finance]] | taoiseach4 = Seán Lemass | term_start4 = 21 April 1965 | term_end4 = 10 November 1966 | predecessor4 = [[James Ryan (Irish politician)|James Ryan]] | successor4 = Charles Haughey | office5 = [[Minister for Business, Enterprise and Innovation|Minister for Industry and Commerce]] | taoiseach5 = Seán Lemass | term_start5 = 23 June 1959 | term_end5 = 21 April 1965 | predecessor5 = Patrick Hillery | successor5 = Charles Haughey | office6 = [[Minister for Education and Skills|Minister for Education]] | taoiseach6 = Éamon de Valera | term_start6 = 20 March 1957