Question: In 2015, what was the official seating capacity of the stadium at which the 1964 Sooners played their home games?

Context articles: Dial–Roberson Stadium
Wantland Stadium
Papa John's Cardinal Stadium
MCU Park
1964 Oklahoma Sooners football team
Gaylord Family Oklahoma Memorial Stadium
Holman Stadium (Vero Beach)
Holman Stadium (Nashua)
Troy Softball Complex
Kyle Field

Dial-Roberson All-Events Stadium is a stadium on the campus of Ohio Northern University in Ada, Ohio, United States.
 The stadium is the home of the Ohio Northern Polar Bears football team, and also houses facilities for other ONU athletic teams.
 The stadium has an official seating capacity of 3,500, but can accommodate more than 1,000 additional spectators on the lawn surrounding the field.
Wantland Stadium is the on-campus football facility for the University of Central Oklahoma Bronchos in Edmond, Oklahoma.
 The official seating capacity of the stadium, following recent renovations, is 10,000, making it one of tied for the 16th largest Division II stadium, and tied for the largest in the Mid-America Intercollegiate Athletics Association (with Walton Stadium and Francis G. Welch Stadium of the University of Central Missouri and Emporia State University respectively).
Papa John's Cardinal Stadium is a football stadium located in Louisville, Kentucky, United States, on the southern end of the campus of the University of Louisville.
 Debuting in 1998, it serves as the home of the Louisville Cardinals football program.
 The official seating capacity in the quasi-horseshoe shaped facility was 42,000 through the 2008 season.
 An expansion project that started after the 2008 season was completed in time for the 2010 season has brought the official capacity to 55,000.
 An additional expansion project aiming to close the open end of the horseshoe to add 10,000 additional seats was announced on August 28, 2015, with the goal of opening within 2 years.
MCU Park (formerly KeySpan Park) is a minor league baseball stadium in the Coney Island section of Brooklyn, New York City, USA.
 The home team is the New York Mets-affiliated Brooklyn Cyclones of the New York–Penn League.
 MCU Park is also the home of the New York Empire Ultimate team of the AUDL in 2013.
 The NYU Violets Baseball team began playing at MCU Park in 2015.
 As of 2017 MCU Park is also the home of the New York Cosmos Soccer Club of the NASL.
 Official seating capacity is 7,000, though the Cyclones will sell up to 2,500 more standing room tickets.
 Prior to 2016, the capacity was 7,500 plus 2,500 standing room.
The 1964 Oklahoma Sooners football team represented the University of Oklahoma during the 1964 college football season.
 They played their home games at Oklahoma Memorial Stadium and competed as members of the Big Eight Conference.
 They were coached by first–year head coach Gomer Jones.
Gaylord Family - Oklahoma Memorial Stadium, also known as Owen Field or The Palace on the Prairie, is the on-campus football facility on the campus of the University of Oklahoma in Norman, Oklahoma, United States, that serves as the home of the Oklahoma Sooners football team.
 The official seating capacity of the stadium, following renovations in 2015, is 86,112, making it the 23rd largest stadium in the world, the 15th largest college stadium in the United States and the second largest in the Big 12 Conference, behind Darrell K Royal–Texas Memorial Stadium at the University of Texas at Austin.
Holman Stadium is a baseball stadium in Vero Beach, Florida, built in 1953 from an abandoned Naval base, to accommodate spring training for the Brooklyn Dodgers as part of a complex now called Historic Dodgertown.
 In addition to the Dodgers' spring games, it was also the home of the Vero Beach Devil Rays, previously the Vero Beach Dodgers, of the Florida State League, through the 2008 season.
 Official seating capacity is 6,500.
Holman Stadium is a baseball stadium in Nashua, New Hampshire.
 It was constructed in 1937, as a multi-purpose stadium, by the City of Nashua.
 The official seating capacity is 4,000 people.
 Holman is currently the home of the Nashua Silver Knights of the Futures Collegiate Baseball League.
The Troy Softball Complex, built in 2002 on the campus of Troy University, is the home stadium for the Division I (NCAA) Troy Trojans softball team.
 In 2014, the entire complex underwent a $3 million renovation project.
 The official seating capacity is 800, with 120 of the seats being chairback seating.
 The Dodd Center was built in 2014 during the renovation, which houses coaches offices, player lounge, and locker rooms, and indoor batting cages.
 In the opening game of 2014, Troy hosted Auburn at the newly renovated field, finishing in a 5-5 tie with the Tigers.
Kyle Field is the football stadium located on the campus of Texas A&M University in College Station, Texas.
 It has been the home to the Texas A&M Aggie football team in rudimentary form since 1904, and as a complete stadium since 1927.
 It is known as the ""Home of the 12th Man"".
 The seating capacity of 102,733 in 2015 makes the stadium the largest in the Southeastern Conference and the fourth largest stadium in the NCAA, fourth largest stadium in the United States, and the fifth largest non-racing stadium in the world.
 Within the state of Texas, Kyle Field has the largest regular seating capacity, while AT&T Stadium has a larger overall capacity.