Question: What level of the Argentine football system does the club based in the leafy, northern neighborhood of Buenos Aires play?

Context paragraphs:
CA Excursionistas: Club Atlético Excursionistas (familiarly called Excursio by fans) is an Argentine football club based in the Belgrano neighbourhood of Buenos Aires.  The squad currently plays in the Primera B Metropolitana, the third level of the Argentine football league system.

Edward Banfield (railroad engineer): Edward Banfield (9 February 1837 – 6 July 1872) was an English railroad engineer who drove the first locomotive ("La Porteña") through Buenos Aires, Argentina, in 1857 as part of the Buenos Aires Western Railway.  He was the first General Manager of the British-owned Buenos Aires Great Southern Railway between 1865 and 1872, founded in Argentina by Edward Lund in 1862.  Banfield died in 1872, and the town of Banfield in Buenos Aires Province, founded in 1873, was named after him.  The professional Argentine football club Club Atlético Banfield also carries his name.

Estudiantes de Buenos Aires: Club Atlético Estudiantes, usually called Estudiantes de Caseros or Estudiantes de Buenos Aires, is an Argentine football club from Caseros, Buenos Aires.  The club is mostly known for its football team, which currently plays in the Primera B Metropolitana, the regionalised third division of the Argentine football league system.

Sportivo Dock Sud: Club Sportivo Dock Sud is an Argentine football club based in the Dock Sud district of Avellaneda Partido, Greater Buenos Aires.  The club is mostly known for its football team, which currently plays in Primera C Metropolitana, the regionalised fourth division of the Argentine football league system.

Torneo Federal A: The Torneo Federal A (in English "Federal A Tournament") was founded in 2014 as a result of a change in the structure of the Argentine football league system, is one of the two leagues that form the regionalised third level of the Argentine football league system.  Clubs in the Torneo Federal have indirect membership in AFA, while clubs in the Primera B Metropolitana (the other third division) have direct membership in AFA.  All teams with indirect membership are from outside the city of Buenos Aires and its metropolitan area (Greater Buenos Aires), while most of the direct members are from the aforementioned area.

Club Atlético Lugano: Club Atlético Lugano is an Argentine football club from Tapiales neighborhood in La Matanza Partido, Greater Buenos Aires.  The team currently plays in Primera D, the regionalised 5th level of Argentine football league system.

Belgrano, Buenos Aires: Belgrano is a leafy, northern "barrio" or neighborhood of the city of Buenos Aires, Argentina.

Club Atlético Vélez Sarsfield: Club Atlético Vélez Sarsfield is an Argentine sports club based in Liniers, Buenos Aires.  Its football team plays in Primera División, the highest level of the Argentine league system.  Founded in 1910, the club have spent most of their history in the top tier of Argentine football.  The club's home ground is the 49,540-capacity José Amalfitani stadium, where they have played since 1951.

San Lorenzo de Almagro: Club Atlético San Lorenzo de Almagro, commonly known as San Lorenzo de Almagro or simply San Lorenzo (in English: "Saint Lawrence"), is an Argentine sports club based in the Boedo district of Buenos Aires.  It is best known for its football team, which plays in the Primera División, the first tier of the Argentine football league system.  San Lorenzo is also considered one of the "big five" (""Los 5 Grandes"") of Argentine football by Argentine press, with Independiente, River Plate, Boca Juniors, and Racing Club.

Buenos Aires Cricket &amp; Rugby Club: Buenos Aires Cricket & Rugby Club, sometimes known simply as Buenos Aires, is an Argentine sports club based in San Fernando, Buenos Aires.  The club claims to be the oldest club still in existence in Argentina, according to reports of a cricket match played by the club in Recoleta, Buenos Aires, in 1831.

Supporting paragraphs: CA Excursionistas Belgrano, Buenos Aires
Answer: Primera B Metropolitana