question: In what year was the politician who represented Nevada's new district, that was created as a result of the 2010 Census, from 2013-2015 born?
answer: 1973
context: Title: Nevada's 4th congressional district
  Passage: Nevada's 4th Congressional District is a new district that was created as a result of the 2010 Census.  Located in the central portion of the state, it includes most of northern Clark County, southern Lyon County, and all of Esmeralda, Lincoln, Mineral, Nye, and White Pine counties.  Although the district appears rural, almost 90% of the district's population lives in Clark County.
  Title: Steven Horsford
  Passage: Steven Alexander Horsford (born April 29, 1973) is an American politician who was the United States Representative for Nevada's 4th congressional district from 2013 to 2015.  Horsford previously served in the Nevada Senate, representing Clark County's 4th Senate District from 2005 to 2012.  He also served as Nevada's first African-American state senate Majority Leader and was the first African American to represent Nevada in Congress.  He is a member of the Democratic Party.
  Title: Lanark—Frontenac—Lennox and Addington
  Passage: Lanark—Frontenac—Lennox and Addington is a federal electoral district in Ontario, Canada which has been represented in the House of Commons of Canada since 2004.  It was scheduled to be abolished at the time of the 2015 general election; the Lanark County and Frontenac components of the riding will be redistributed into the new district of Lanark—Frontenac, while Lennox and Addington County will be redistributed into the new district of Hastings—Lennox and Addington.
  Title: Texas's 34th congressional district
  Passage: Texas's 34th Congressional District is a district that was created as a result of the 2010 Census.  The first candidates ran in the 2012 House elections, and were seated for the 113th United States Congress.  Filemon Vela, Jr. won the general election, and was seated in the new district.
  Title: Texas's 36th congressional district
  Passage: Texas's 36th Congressional District is a new district that was created as a result of the 2010 Census.  The first candidates ran in the 2012 House elections for a seat in the 113th United States Congress.  Steve Stockman won the general election, and represented the new district.  On December 9, 2013, Stockman announced that he would not seek reelection in 2014, and would instead challenge incumbent John Cornyn in the Republican senatorial primary, and was succeeded in the U.S. House by Brian Babin.
citations: Steven Horsford Nevada's 4th congressional district