 Complete the following phrase:  Basketball is a very popular sport, mostly in the provinces of Argentina. The Basketball Clubs Association organizes the Liga Nacional de Básquet, the top-level league in the country. Although the National team won the first FIBA World Championship in 1950, the sport did not gain country-wide popularity until the 2000s, when the national team conquered the Olympic gold medal at the 2004 Summer Olympics and had a good performance in the 