question: What year did the football team inthe most educated, highest-income, and fourth largest combined statistical area in the United States join the Big Ten Conference?
answer: 2014
context: Title: Zak Irvin
  Passage: Zakarie Tyler "Zak" Irvin (born September 5, 1994) is an American basketball for Victoria Libertas Pesaro of the Italian League.  He played college basketball for the Michigan Wolverines.  He earned the 2013 Indiana Mr. Basketball and Indiana Boys Basketball Gatorade Player of the Year while playing for Hamilton Southeastern High School.  At Michigan, he was twice recognized as Big Ten Conference Freshman of the Week for the 2013–14 team, which won the 2013–14 Big Ten Conference regular-season championship outright.  He was a 2015–16 Big Ten Conference men's basketball season All-Big Ten honorable mention honoree by the coaches and the media as well as a 2016 Big Ten Conference Men's Basketball Tournament All-Tournament Team selection as a junior.  He was a 2016–17 Big Ten Conference men's basketball season All-Big Ten honorable mention honoree by the media as a senior as well as a 2017 Big Ten Conference Men's Basketball Tournament All-Tournament Team selection for the champion 2016–17 Wolverines.  He led the Big Ten in minutes played as a senior and tied the Michigan record for career games played (142).
  Title: Maryland Terrapins football
  Passage: The Maryland Terrapins football team represents the University of Maryland, College Park in the sport of American football.  The Terrapins compete in the Football Bowl Subdivision (FBS) of the National Collegiate Athletic Association (NCAA) and the Big Ten Conference.  The Terrapins joined the Big Ten Conference on July 1, 2014, following 62 years in the Atlantic Coast Conference as a founding member.  The Terrapins are currently coached by D. J. Durkin.  Since 1950, the Terrapins have played their home games at Maryland Stadium in College Park, Maryland with occasional home games from time to time in Baltimore, Maryland, making them one of two FBS football teams in the Baltimore–Washington metropolitan area (Navy Midshipmen) and the closest Football Bowl Subdivision team to Washington, D.C. The team's official colors of red, white, black, and gold have been in use in some combination since the 1920s and are taken from Maryland's state flag, and the Terrapins nickname — often abbreviated as "Terps" — was adopted in 1933 after a turtle species native to the state.  Maryland shares storied rivalries with Virginia and West Virginia.
  Title: Baltimore–Washington metropolitan area
  Passage: The Baltimore–Washington metropolitan area is a combined statistical area consisting of the overlapping labor market region of the cities of Washington, D.C. and Baltimore, Maryland.  The region includes Central Maryland, Northern Virginia, three counties in the Eastern Panhandle of West Virginia, and one county in South Central Pennsylvania.  It is the most educated, highest-income, and fourth largest combined statistical area in the United States.
citations: Maryland Terrapins football Baltimore–Washington metropolitan area