Complex sentence: Club Almirante Brown (mostly known simply as Almirante Brown) is an Argentine football club from Isidro Casanova in the Greater Buenos Aires, currently playing in the Primera B Nacional, the second level of Argentine football league system.
Split into simpler sentences: Club Almirante Brown (mostly known simply as Almirante Brown) is an Argentine sports club from Isidro Casanova, Greater Buenos Aires. The club is mostly known for its football team, which currently plays in the Primera B Nacional, the second level of Argentine football league system.