Information:  - The pope (from "pappas", a child's word for "father") is the Bishop of Rome and, therefore, the leader of the worldwide Catholic Church. The primacy of the Roman bishop is largely derived from his role as the traditional successor to Saint Peter, to whom Jesus is supposed to have given the keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built. The current pope is Francis, who was elected on 13 March 2013, succeeding Benedict XVI.  - For the Archdiocese in California , USA , please see Roman Catholic Archdiocese of San Francisco The Roman Catholic Diocese of San Francisco ( Latin : Dioecesis Franciscopolitanus ) is in Argentina and is a suffragan of the Archdiocese of Córdoba .  - A cathedral (French: "cathédrale" from Latin: "cathedra", "seat" from the Greek "kathédra" (), seat, bench, from "kata" "down" + "hedra" seat, base, chair) is a Christian church which contains the seat of a bishop, thus serving as the central church of a diocese, conference, or episcopate. The counterpart term for such a church in German is "Dom" from Latin "domus ecclesiae" or "domus episcopalis"; also Italian Duomo, Dutch "Domkerk" and cognates in many other European languages. Churches with the function of "cathedral" are usually specific to those Christian denominations with an episcopal hierarchy, such as the Roman Catholic, Anglican, Orthodox, and some Lutheran and Methodist churches. Church buildings embodying the functions of a cathedral first appear in Italy, Gaul, Spain and North Africa in the 4th century, but cathedrals did not become universal within the Western Catholic Church until the 12th century, by which time they had developed architectural forms, institutional structures and legal identities distinct from parish churches, monastic churches and episcopal residences.  - The word diocese is derived from the Greek term "" meaning "administration". When now used in an ecclesiastical sense, it refers to a territorial unit of administration. In the Western Church, the district is under the supervision of a bishop (who may have assistant bishops to help him or her) and is divided into parishes under the care of priests; but in the Eastern Church, the word denotes the area under the jurisdiction of a patriarch and the bishops under his jurisdiction administer parishes. This structure of church governance is known as episcopal polity.  - The Roman Catholic Archdiocese of San Francisco (Latin: "Archdioecesis Sancti Francisci"; Spanish: "Archidiócesis de San Francisco") is an ecclesiastical territory or diocese of the Catholic Church in the northern California region of the United States. It covers the City and County of San Francisco and the Counties of Marin and San Mateo. The Archdiocese of San Francisco was canonically erected on July 29, 1853, by Pope Pius IX and its cathedral is the Cathedral of Saint Mary of the Assumption.  - California is the most populous state in the United States and the third most extensive by area. Located on the western (Pacific Ocean) coast of the U.S., California is bordered by the other U.S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. The state capital is Sacramento. Los Angeles is California's most populous city, and the country's second largest after New York City. The state also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County.  - The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with more than 1.27 billion members worldwide. As one of the oldest religious institutions in the world, it has played a prominent role in the history of Western civilisation. Headed by the Bishop of Rome, known as the pope, its doctrines are summarised in the Nicene Creed. The Catholic Church is notable within Western Christianity for its sacred tradition and seven sacraments.    What entity does 'roman catholic diocese of san francisco' has the relation 'instance of' with?
The answer to this question is:
diocese of the catholic church