Please answer the following question: Information: - The Argentine football league system include tournaments organised by the Argentine Football Association. Clubs affiliated to the body compete in the tournaments, which are split into categories or divisions. - Club Almagro is an Argentine sports club from the homonymous district of Buenos Aires . The football team currently plays in the Primera B Metropolitana , the regionalised third division of the Argentine football league system . - The Argentine Football Association is the governing body of football in Argentina. It organises the Primera Division and lower divisions (from Primera B Nacional to Torneo Argentino C), the Argentine Cup, Supercopa Argentina and the Argentina national football team. - Primera B Metropolitana is one of two leagues that form the regionalized third level of the Argentine football league system. The other league at level three is the Torneo Federal A. What is the relationship between 'club almagro' and 'primera b nacional'?
A:
league