Question: Marina Raquel Riofrío, is an Argentine Justicialist Party politician, and was born in San Juan, the capital city of the Argentine province of San Juan in which region?

Context paragraphs:
José Luis Gioja: José Luis Gioja (born 1949) is an Argentine Justicialist Party (PJ) politician, former governor of San Juan Province and former President of the Argentine Senate.

Guillermo Jenefes: Guillermo Raúl Jenefes (born 7 September 1950, San Salvador de Jujuy) is an Argentine Justicialist Party politician.  He sits in the Argentine Senate representing Jujuy Province in the majority block of the Front for Victory.

Daniel Pérsico: Daniel Raúl Pérsico (born 31 October 1961, San Luis, Argentina) is an Argentine Justicialist Party politician.  He sits in the Argentine Senate representing San Luis Province in the majority block of the Front for Victory.

Mario das Neves: Mario Das Neves (born April 27, 1951) is an Argentine Justicialist Party politician.  He is the governor of the Argentine province of Chubut.

Juan Carlos Romero (politician): Juan Carlos Romero (born 16 November 1950) is an Argentine Justicialist Party politician and senator, and was governor of Salta Province for 12 years.

Marina Riofrío: Marina Raquel Riofrío (born 30 May 1958, San Juan) is an Argentine Justicialist Party politician.  She sits in the Argentine Senate representing San Juan Province in the majority block of the Front for Victory.

Nanci Parrilli: Nanci María Augustina Parrilli (born 7 September 1953, San Martín de los Andes) is an Argentine Justicialist Party politician.  She sits in the Argentine Senate representing Neuquén Province in the majority block of the Front for Victory.

Adriana Bortolozzi: Adriana Raquel Bortolozzi de Bogado (born 1 March 1949, Gessler, Santa Fe) is an Argentine Justicialist Party politician.  She sits in the Argentine Senate representing Formosa Province in the majority block of the Front for Victory.

San Juan, Argentina: San Juan (] ) is the capital city of the Argentine province of San Juan in the Cuyo region, located in the Tulúm Valley, west of the San Juan River, at 650 m above mean sea level, with a population of around 112,000 as per the 2001 census (over 500,000 in the metropolitan area).

César Gioja: César Ambrosio Gioja (born 10 February 1945, San Juan) is an Argentine Justicialist Party politician.  He sits in the Argentine Senate representing San Juan Province in the majority block of the Front for Victory.

Supporting paragraphs: Marina Riofrío San Juan, Argentina
Answer: Cuyo