Question: Joaquín Mariano Sucunza, is a prelate of the Roman Catholic Church, he serves as auxiliary bishop since 2000, of which one of thirteen Latin Metropolitan archdioceses of the Catholic Church in Argentina, South America?

Context paragraphs:
Roman Catholic Archdiocese of Buenos Aires: The Archdiocese of Buenos Aires ("Archidioecesis Bonaerensis") is one of thirteen Latin Metropolitan archdioceses of the Catholic Church in Argentina, South America.

Union of Utrecht (Old Catholic): The Union of Utrecht of the Old Catholic Churches (UU) is a federation of Old Catholic churches, nationally organised from 1870 schisms which rejected Roman Catholic doctrines of the First Vatican Council; its member churches are not in communion with the Roman Catholic Church.  The 1889 "" is one of three founding documents together called the Convention of Utrecht.  The is in full communion with the Anglican Communion through the 1931 Bonn Agreement; and, with the Philippine Independent Church, the Spanish Reformed Episcopal Church, and the Lusitanian Catholic Apostolic Evangelical Church through a 1965 extension of the Bonn Agreement.  s of 2016, the includes six member churches: the Old Catholic Church of the Netherlands (OKKN), the Catholic Diocese of the Old Catholics in Germany, the Christian Catholic Church of Switzerland, the Old Catholic Church of Austria, the Old Catholic Church of the Czech Republic, and the Polish Catholic Church in Poland .

Bolesław Pylak: Bolesław Pylak (born 20 August 1921) is a Polish prelate of the Roman Catholic Church.  He is currently the oldest living Roman Catholic bishop in Poland.  Pylak was born in Łopiennik Górny, Poland and was ordained a priest on 29 June 1948 from Archdiocese of Lublin.  Pylak was appointed Auxiliary bishop of the Lublin diocese as well as Titular bishop of Midica on 14 March 1966, and ordained a bishop on 29 May 1966.  Pylak was appointed archbishop of the Archdiocese of Lublin on 27 June 1975 and served in that capacity until his retirement on 14 June 1997.

Joaquín Mariano Sucunza: Joaquín Mariano Sucunza (February 15, 1946) is a prelate of the Roman Catholic Church.  He serves as auxiliary bishop of Buenos Aires since 2000.

Joseph J. Tyson: Joseph Jude Tyson (born October 16, 1957) is an American prelate of the Roman Catholic Church who is currently the Bishop (Catholic Church) of the Diocese of Yakima, Washington.  He served as an auxiliary bishop of the Archdiocese of Seattle from 2005–2011.

List of Catholic dioceses in Italy: The following is the List of the Roman Catholic dioceses in Italy.  The Roman Catholic Church in Italy is composed per May 2017 of 227 sees ('particular churches'), most of which are (arch)dioceses led by bishops. Dioceses led by archbishops are called archdioceses.  There are 40 Metropolitan archdioceses (including the papal Holy See and the Patriarchate of Venice), each serving as the seat of a Roman Catholic ecclesiastical province in Italy.  There are also approximately 4 non-metropolitan archdioceses and thus there are approximately 46 archbishops in total in the Catholic Church of Italy.

Robert F. Vasa: Robert Francis Vasa (born May 7, 1951) is an American prelate of the Roman Catholic Church.  On Monday, January 24, 2011, Bishop Vasa, 59, was named the Coadjutor Bishop (an Auxiliary Bishop with the right of succession), to Bishop Daniel F. Walsh of the Roman Catholic Diocese of Santa Rosa in California, by Pope Benedict XVI.  Until then, he had been the fifth Bishop of Baker, in Oregon, which with his new appointment became a vacant see (sede vacante).

Jesus Varela: Jesus Y. Varela is a Filipino prelate of the Catholic Church.  He became the Bishop Emeritus of the Roman Catholic Diocese of Sorsogon on his retirement on April 16, 2003.  He was appointed bishop of Sorsogon on November 27, 1980 Prior to that he served as the first ever sitting Bishop of then Diocese of Ozamiz.  He also served as the Auxiliary Bishop of the Roman Catholic Archdiocese of Zamboanga and titular Bishop of Tatilti.

Cornel Damian: Cornel Damian (born May 8, 1960) is a Romanian cleric, auxiliary bishop of the Roman Catholic Archdiocese of Bucharest.  Born in Jibou, he moved with his family to Drobeta-Turnu Severin, where he finished high school.  His parents were Greek-Catholic, but as their church was banned under the communist regime, Damian was raised in the Roman Catholic tradition.  He attended the Roman Catholic Theological Institute of Iași and was ordained a priest in 1986 at Saint Joseph's Cathedral in Bucharest.  He was assistant priest at the Cioplea Church and from 1987 to 1998 parish priest at another Bucharest parish.  He began teaching moral theology in 1991 at a theological institute which opened that year.  From 1998 to 2002 he studied canon law at the Pontifical Gregorian University in Rome.  In 2002 he was assigned to a new parish and began teaching canon law.  In 2003, having been chosen auxiliary bishop by Pope John Paul II, he was consecrated titular bishop of Iziriana at the Bucharest cathedral by Archbishop Ioan Robu.

Nicholas Elko: Nicholas Thomas Elko (December 14, 1909 – May 18, 1991) was the third bishop of the Byzantine Catholic Metropolitan Church of Pittsburgh, the American branch of the Ruthenian Catholic Church.  At the age of 46 he became the first American-born Bishop of the Greek Catholic Church.  He later served as Auxiliary Bishop of the Roman Catholic Archdiocese of Cincinnati, Ohio.

Supporting paragraphs: Joaquín Mariano Sucunza Roman Catholic Archdiocese of Buenos Aires
Answer: Archdiocese of Buenos Aires