Question: What conference did J. T. Tiller's collegiate team belong to prior to the 2012-2013 season?
Context: The 2013 NCAA Skiing Championships were held in Middlebury, VT and Ripton, VT on March 6–9, 2013.  Middlebury College hosted the event with alpine events at the Middlebury College Snow Bowl and Nordic events taking place at the Rikert Nordic Center.  The competition was won by the Colorado Buffaloes after compiling the largest final-day comeback in NCAA Skiing Championships history.  Twenty-one teams from three regions sent skiers to compete for the NCAA collegiate team championship and individual titles. The Duke Blue Devils baseball team is the varsity intercollegiate baseball program of Duke University, based in Durham, North Carolina, United States.  The team has been a member of the Atlantic Coast Conference since the conference's founding in the 1954 season.  The program's home venue is the Durham Bulls Athletic Park, which opened in 1995.  Chris Pollard has been the head coach of the team since the 2013 season.  As of the end of the 2013 season, the Blue Devils have appeared in three College World Series in three NCAA Tournaments.  They have won three ACC Championships.  As of the start of the 2013 Major League Baseball season, 34 former Blue Devils players have played in Major League Baseball. The official 2012/2013 snooker world ranking points for the professional snooker players on the World Snooker Main Tour in the 2012/2013 season were based on performances in ranking tournaments over a two-year rolling period.  The total points from the 2010/2011 and 2011/2012 seasons set the rankings at the start of 2012/2013 season and were updated after every ranking tournament.  As points were accrued from tournaments in the current season, the points from the corresponding tournaments from two seasons ago were dropped.  The rankings set the official seedings at the start of the season and at four further points during the season.  The total points accumulated by the cut-off dates for the revised seedings were based on all the points up to that date in the 2012/2013 season, all of the points from the 2011/2012 season, and the points from the 2010/2011 season that had not yet been dropped.  The total points from the 2011/2012 and 2012/2013 seasons set the rankings at the start of the 2013/2014 season. The North Carolina Tar Heels football team represents the University of North Carolina at Chapel Hill in the sport of American football.  The Tar Heels have played in the Football Bowl Subdivision (FBS) of the National Collegiate Athletic Association (NCAA) and the Coastal Division of the Atlantic Coast Conference (ACC).  Being the oldest public university and oldest collegiate team in the Carolinas, the school is nicknamed "Carolina" in athletics.  The program's title in football is "Carolina Football". The Purdue Boilermakers football program is a college football team that represents Purdue University in the Big Ten Conference in the National Collegiate Athletic Association.  The team has had 34 head coaches since it started playing organized football in 1887 and has been known by the nickname "Boilermakers" since 1891.  Purdue is an original member of the Big Ten, joining in 1896 after spending six years in the Indiana Intercollegiate Athletic Association.  The Boilermakers have played in 1,117 games during their 122 seasons.  Four coaches have led the Boilermakers to postseason bowl games: Jack Mollenkopf, Jim Young, Leon Burtnett, and Joe Tiller.  Nine coaches have won conference championships with the Boilermakers: Snake Ames and D. M. Balliet in the Indiana Intercollegiate Athletic Association, and A. G. Scanlon, James Phelan, Noble Kizer, Elmer Burnham, Stu Holcomb, Mollenkopf and Tiller in the Big Ten.  No Purdue coach has led the Boilermakers to a national championship.  As of the end of the 2009 season, Tiller is the all-time leader in games coached (149) and wins (87), while Mollenkopf is the all-time leader years coached (14).  Ames leads the Boilermakers in winning percentage with a perfect 1.000 in his two seasons at Purdue.  Among coaches with more than two seasons of tenure, Kizer has the highest winning percentage, .750, and Fred Akers has the lowest winning percentage, with a record of 12-31-1 (.284) in four seasons. The Lake Forest Foresters football team, representing Lake Forest College, is an NCAA Division III college football team and member of the Midwest Conference.  Lake Forest claims they are the sixteenth collegiate team in the nation. The Missouri Tigers men's basketball team represents the University of Missouri in the SEC.  Prior to the 2012–2013 season, the basketball team represented the school in the Big 12 Conference.  They are located in Columbia, Missouri, playing home games at Mizzou Arena (15,061).  The team last played in the NCAA Division I Men's Basketball Tournament in 2013.  The Tigers' next season in 2017–18 will be their first under new head coach Cuonzo Martin, who was hired away from California to replace the fired Kim Anderson.  The Missouri men's basketball program was a charter member of the Big 12 Conference, formed from the Big Eight Conference in 1996.  Following the 2016–17 season, the Tigers had an all-time record of 1,593–1,133 and a winning percentage of . J. T. Tiller (born May 11, 1988) is an American professional basketball player.  He played collegiately with the University of Missouri Tigers. The 1975 Lamar Cardinals football team represented Lamar University in the 1975 NCAA Division I football season as a member of the Southland Conference.  The Cardinals played their home games at Cardinal Stadium now named Provost Umphrey Stadium in Beaumont, Texas.  Lamar finished the 1975 season with a 1–10 overall record and a 1–4 conference record.  The 1975 season was coach Vernon Glass's final season as the Cardinals' head football coach.  Playing the Southern Miss Golden Eagles in the Superdome and the Houston Cougars in the Astrodome, the Cardinals became "...the first collegiate team to play games in two domed stadiums in the same season". The West Virginia Mountaineers baseball team is the varsity intercollegiate baseball program of West Virginia University, located in Morgantown, West Virginia, United States.  The program has been a member of the NCAA Division I Big 12 Conference since the start of the 2013 season.  The program currently plays at Monongalia County Ballpark in the adjacent city of Granville.  Randy Mazey has been the team's head coach since prior to the 2013 season.  As of the end of the 2015 season, the program has appeared in 11 NCAA Tournaments.  It has won five conference tournament championships and 15 regular season conference and division titles.
Answer: Big 12 Conference