Question: In what part of Buenos Aires Province is the city that has The Juan Carlos Castagnino Municipal Museum of Art located?

Context paragraphs:
Governor of Buenos Aires Province: The Governor of Buenos Aires province is a citizen of the Buenos Aires Province of Argentina, holding the office of governor for the corresponding period.  The governor is elected alongside a vice-governor.  Currently the governor of Buenos Aires Province is Maria Eugenia Vidal since December 10, 2015.

Decembrist revolution (Argentina): The Decembrist revolution (Spanish: "Revolución decembrina" ) was a military coup in the Buenos Aires Province, Argentina.  Juan Lavalle, returning with the troops that fought in the Argentine-Brazilian War, made a coup on December 1, 1828, deposed the governor Manuel Dorrego and closed the legislature.  Dorrego was captured and executed a short time afterwards.  The rancher Juan Manuel de Rosas organized militias that fought against Lavalle and removed him from power, restoring the legislature.  However, as the coup had reignited the Argentine Civil Wars, Rosas was appointed governor of the Buenos Aires province to wage the war against the Unitarian League.  José María Paz made from Córdoba a league of provinces, and so did Rosas.  The conflict ended a short time after the unexpected capture of Paz, who mistook enemy troops for his own.

Mar del Plata: Mar del Plata is an Argentine city in the southeast part of Buenos Aires Province located on the coast of the Atlantic Ocean.  It is the head of General Pueyrredón Partido.  Mar del Plata is the second largest city in Buenos Aires Province.  The name "Mar del Plata" has the meaning of "sea of the Silver region" or "adjoining sea to the (River) Silver region".  Mar del Plata is one of the major fishing ports and the biggest seaside beach resort in Argentina.

National University of Central Buenos Aires: The National University of Central Buenos Aires ("Universidad Nacional del Centro de Buenos Aires") is a public institution of higher learning located in Tandil, a city in the central region of Buenos Aires Province, Argentina.  It was founded in 1974 as part of University of Buenos Aires Professor Alberto Taquini's plan to geographically diversify Argentina's National University system.

Juan Carlos Castagnino: Juan Carlos Castagnino (November 18, 1908April 21, 1972) was an Argentine painter, architect, muralist and sketch artist.

Béccar: Beccar is a middle residential neighbourhood located 17 km north of the Buenos Aires metropolitan area in the Buenos Aires Province, Argentina.  It is part of the "partido" of San Isidro in Gran Buenos Aires.  It is situated close to the historic town of San Isidro and it is characterized by tree lined streets and plazas, red tiled roofed style chalets, high-rise apartment buildings that line the Avenida Centenario zone and by being close to the coast of Rio de la Plata river and yacht clubs.  Nearby there is a large shanty town "(Villa La Cava)".  Beccar is served by a 10-minute walk to scenic Tren de la Costa light rail line at Punta Chica station and the commuter railway at Beccar station with easy access to Buenos Aires city centre and the weekend retreat of the Village of Tigre.

Magda Frank: Magda Frank Fischer (July 20, 1914 – June 23, 2010) was a Hungarian-Argentine sculptor.  She was born in Kolozsvár, Transylvania, which at that time belonged to Hungary but in 1918, was incorporated into Romania.  Because of Nazi persecution, she left Hungary to settle in Switzerland.  Years later, she moved to Paris to study at the Académie Julian.  In 1950, she arrived in Buenos Aires, Argentina to visit her brother, her only living family member.  Here, she was appointed professor at the Artes Visuales de Buenos Aires and exhibited at the Galería Pizarro.  She participated in the Premio Palanza Buenos Aires.  She received the Benito Quinquela Martín award at the Eduardo Sívori Museum, and was honored by the Argentine Senate.  Her works are part of the collections at the Musée National d'Art Moderne in Paris, the National Museum of Fine Arts in Paris, the National Museum of Fine Arts in Buenos Aires.  Frank resettled in Argentina in 1995 and built the Magda Frank House Museum in the Saavedra barrio at Vedia 3546.  She died in 2010 in Buenos Aires, Argentina.

Battle of Márquez Bridge: The Battle of Márquez Bridge (located on the border between current-day Villa Udaondo and Paso del Rey, Buenos Aires Province, Argentina), fought on 26 April 1829, during the civil war between Unitarians and Federalists, resulting in a victory for the Federal Party forces of Juan Manuel de Rosas and the governor of Santa Fe Province, Estanislao López, over general Juan Lavalle, who had usurped the office of Governor of Buenos Aires Province.

Juan Carlos Castagnino Municipal Museum of Art: The Juan Carlos Castagnino Municipal Museum of Art is a museum of fine arts in Mar del Plata, Argentina.

Ángel María de Rosa Municipal Museum of Art: The Ángel María de Rosa Municipal Museum of Art (MUMA) is an art museum in Junín, a city in the north of Buenos Aires Province, Argentina.

Supporting paragraphs: Juan Carlos Castagnino Municipal Museum of Art Mar del Plata
Answer: southeast