Social sports are rich in content and diverse forms of the body performed by enterprises, employees of public institutions, the staff of state organs, and urban or rural residents and other groups to achieve fitness, fitness, fitness, entertainment, medical treatment and other purposes. Exercise activities. According to the above definition, which of the following activities is not a social sport activity? ['Mass running race organized by Beijing Sports Commission.', 'A university held a friendly match between the faculty basketball team and the community basketball team.', 'A city hosted the International Triathlon.', 'A community resident tennis match at the National Olympic Sports Center.']