Question: On what campus did Group B of the 2015 CONCACAF Gold Cup play on July 8?

Context articles: 2013 CONCACAF Gold Cup Group B
2015 CONCACAF Gold Cup Final
2015 CONCACAF Gold Cup knockout stage
2015 CONCACAF Gold Cup
2015 CONCACAF Gold Cup Group C
2015 CONCACAF Gold Cup Group A
2019 CONCACAF Cup
2015 CONCACAF Gold Cup Group B
StubHub Center
2015 CONCACAF Cup

Group B of the 2013 CONCACAF Gold Cup was one of three groups competing of nations at 2013 CONCACAF Gold Cup.
 The group's first round of matches were played on July 8, with the final round played on July 15.
 All six group matches were played at venues in the United States, in Harrison, NJ, Miami Gardens, FL and Houston.
 The group consisted of Haiti, Honduras, El Salvador and Trinidad and Tobago.
The 2015 CONCACAF Gold Cup Final decided the winners of the 2015 CONCACAF Gold Cup.
 It was held on 26 July 2015 at Lincoln Financial Field in Philadelphia, and contested by Jamaica and Mexico.
 It was Jamaica's first final of a CONCACAF championship, and Mexico's 12th; they won a record 10th with a 3–1 victory.
The knockout stage of the 2015 CONCACAF Gold Cup began on July 18, 2015 and ended with the Final on July 26, 2015 which decided the champion of the 2015 CONCACAF Gold Cup (Mexico).
 A total of eight teams competed in the knockout stage.
The 2015 CONCACAF Gold Cup was the 13th edition of the CONCACAF Gold Cup competition and the 23rd CONCACAF regional championship overall in the organization's fifty-four years of existence.
 It was held in the United States, with two matches being played in Canada, marking the first time the CONCACAF Gold Cup was played in that country.
Group C of the 2015 CONCACAF Gold Cup was one of three groups competing of nations at the 2015 CONCACAF Gold Cup.
 The group's matches were played in July.
 All six group matches were played at venues in the United States.
 Matches were played at Chicago's Soldier Field on July 9, Glendale's University of Phoenix Stadium on July 12 and Charlotte's Bank of America Stadium on July 15.
Group A of the 2015 CONCACAF Gold Cup was one of three groups competing of nations at the 2015 CONCACAF Gold Cup.
 The group's matches were played in July.
 All six group matches were played at venues in the United States.
 Matches were played at Frisco's Toyota Stadium on July 7, Foxborough's Gillette Stadium on July 10 and Kansas City's Sporting Park on July 13.
The 2019 CONCACAF Cup (officially the CONCACAF Cup presented by Scotiabank for sponsorship reasons) will be an international football play-off match to determine CONCACAF's entry into the 2021 FIFA Confederations Cup.
 The 2017 CONCACAF Gold Cup winner, the United States, will play against the 2019 CONCACAF Gold Cup winner on a date to be announced and in a venue yet to be announced.
 Should the United States win 2019 edition of the Gold Cup, this match will not take place, and the United States will qualify for the 2021 FIFA Confederations Cup.
Group B of the 2015 CONCACAF Gold Cup was one of three groups competing of nations at the 2015 CONCACAF Gold Cup.
 The group's matches were played in July.
 Four group matches were played at venues in the United States and two were played in Canada.
 Matches were played at Carson's StubHub Center on July 8, Houston's BBVA Compass Stadium on July 11 and Toronto's BMO Field on July 14.
StubHub Center, formerly the Home Depot Center, is a multiple-use sports complex on the West Coast of the United States, located on the campus of California State University, Dominguez Hills in Carson, California.
 It is approximately 14 mi south of Downtown Los Angeles and its primary tenant is the LA Galaxy of Major League Soccer.
The 2015 CONCACAF Cup (officially the CONCACAF Cup presented by Scotiabank for sponsorship reasons) was the inaugural CONCACAF Cup, an international football play-off match to determine CONCACAF's entry into the 2017 FIFA Confederations Cup.
 The 2013 CONCACAF Gold Cup winner United States played against the 2015 CONCACAF Gold Cup winner Mexico on October 10, 2015 at the Rose Bowl in Pasadena, United States.