Question: Greg Gianforte won the special election following the resignation of a politician born in which year ?

Context articles: David Jacoby
Ryan Zinke
Tony Yarber
San Diego mayoral special election, 2005
Greg Gianforte
Beth Turner
Mike Aguirre
Phil Miller (politician)
Kevin Aguiar
Ed Neilson

David "Dave" Jacoby (born 1956) is the Iowa State Representative from the 30th District.
 A Democrat, he has served in the Iowa House of Representatives since 2003, when he was elected in a special election following the resignation of Dick Myers.
Ryan Keith Zinke (born November 1, 1961) is an American politician and businessman who is currently the 52nd United States Secretary of the Interior, serving in the Trump administration.
 Zinke served as the U.S. representative for Montana's at-large congressional district from 2015 until 2017.
 From 2009 to 2013, he served as a member of the Montana Senate, representing the 2nd district.
Tony Tarzell Yarber (born April 16, 1978) is an American pastor, educator and politician in Jackson, Mississippi.
 In April 2014 he was elected as Mayor of Jackson in a special election following the death in office of Chokwe Lumumba.
 A native of Jackson and experienced city councillor, Yarber is noted for his passion for youth causes, and has been described as "a consensus builder".
 He was succeeded as Mayor of Jackson by his predecessor's son Chokwe Antar Lumumba on July 3, 2017.
The 2005 San Diego mayoral special election was a special election held on Tuesday, November 8, 2005, to elect the mayor for San Diego.
 The special election was necessary due to the resignation of former Mayor Dick Murphy.
Gregory Richard Gianforte (born April 17, 1961) is an American businessman, engineer, and politician who is the U.S. Representative for Montana's at-large congressional district.
 On May 25, 2017, he won the special election following Rep. Ryan Zinke's resignation to become Secretary of the Interior.
 Gianforte and his wife founded RightNow Technologies, a customer relationship management software company.
Beth P. Turner (born 13 May 1958 in Maine) is an American politician from Maine.
 A Republican, Turner represents portions of Aroostook County and Penobscot County in the Maine House of Representatives.
 She was first elected in March 2011 in a special election following the death of Rep. Everett McLeod in December 2010.
Jules Michael Aguirre (born 1949), more commonly known as "Michael Jules Aguirre," was the City Attorney for the City of San Diego, California from 2004 to 2008.
 In 2013, he was a candidate for mayor in a special election following Mayor Bob Filner's resignation.
Philip Dean Miller (born c. 1952) is an American politician.
 He was elected to the Iowa House of Representatives in a special election following the death of Curt Hanson to representing the 82nd district as a member of the Democrat party.
 He is a veterinarian with a degree from Iowa State University as well as a member of the Fairfield School Board.
Kevin Aguiar is an American politician who represented the 7th Bristol district in the Massachusetts House of Representatives.
 He was first elected in a 2008 special election following Robert Correia's resignation to become Mayor of Fall River, Massachusetts.
 From 2002-2009, Aguiar served as a member of the Fall School Committee.
 He was defeated for re-election in the 2012 Democratic primary by challenger Alan Silvia, who succeeded him.
Edward "Ed" Neilson is an American politician and member of the Democratic Party.
 In April 2012, he won a special election to represent the 169th District in the Pennsylvania House of Representatives.
 In May 2014 he won a special election to serve as an at-large member of Philadelphia City Council replacing outgoing councilmember Bill Green.
 In August 2015, he won a special election to represent the 174th District in the Pennsylvania House of Representatives.