Recreational sports refer to a highly entertaining physical activity that people perform in their spare time. It is both a means of entertainment and a means of physical exercise. According to the above definitions, which of the following is not an entertainment sport? ['For several years, an international kite festival has been held somewhere every year, and a kite flying competition has been held every time.', 'In order to attract more tourists, a new park held a large fishing competition.', 'On the eve of the Beijing Olympics, many organizations organized employees to participate in a tug of war.', "In order to promote the development of China's basketball career, the Chinese Basketball Association holds CBA games every year."]