Question: What California county contains the birthplace of Arlene B. Arcillas?

full_context: Document 1: San Francisco: San Francisco (initials SF) (/ ˌsæn frənˈsɪskoʊ /, Spanish for Saint Francis; Spanish: (san franˈsisko)), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. The consolidated city - county covers an area of about 47.9 square miles (124 km), mostly at the north end of the San Francisco Peninsula in the San Francisco Bay Area. It is the fourth-most populous city in California, and the 13th-most populous in the United States, with a 2016 census - estimated population of 870,887. The population is projected to reach 1 million by 2033. As of 2016, San Francisco County was the 7th highest - income county in the United States, with a per capita personal income of $110,418.
Document 2: Naval Auxiliary Landing Field Santa Rosa: Naval Auxiliary Landing Field (NALF) Santa Rosa, California, also known as Naval Auxiliary Air Station, Santa Rosa, was a military airport located in Santa Rosa, California, in Sonoma County, California, USA.
Document 3: Graton, California: Graton is an unincorporated town and census-designated place (CDP) in west Sonoma County, California, United States. The population was 1,707 at the 2010 census. Graton's ZIP code is 95444. The town also has a culinary reputation attributed to two restaurants in the area.
Document 4: Santa Rosa Creek Reservoir: Santa Rosa Creek Reservoir is a reservoir in Spring Lake Regional Park in the city of Santa Rosa, California, USA. It is impounded by an earthen dam built in 1963 and owned by the Sonoma County Water Agency.
Document 5: Mayor of Davao City: The Mayor of Davao City is the chief executive of the government of Davao City in the Philippines. The mayor leads the city's departments in executing ordinances and delivering public services. The mayorship is a three-year term and each mayor is restricted to three consecutive terms, totaling nine years, although a mayor can be elected again after an interruption of one term.
Document 6: Joe Rice: Rice presently works for Lockheed Martin Space Systems and also is a member of the United States Army Reserve. He was elected to the city council of Glendale, Colorado in 1994 and to the post of mayor in 1996 on a platform of developing a "resident-friendly" community in the Denver enclave. Rice was re-elected in 2000 and later resigned from the post of mayor in 2003 when called up to serve the first of five tours on active duty in Iraq. In Iraq, he has served as an advisor to the Baghdad city council and to Iraqi security forces.
Document 7: Arlene B. Arcillas: Arlene Bawan Arcillas Nazareno (born July 31, 1969) is the city mayor of Santa Rosa, Laguna since 2007. She was elected senior councilor in 2004 and was elevated as city vice mayor on May 10, 2005 upon death of her father Mayor Leon C. Arcillas under Jose Catindig, Jr.. She assumed office as acting city mayor on October 10, 2006. She held three positions in one term (2004–2006). She was awarded in 2011 with the Presidential Lingkod Bayan Award (highest award given to a government employee and/or official by the Office of the President of the Republic of the Philippines thru the Civil Service Commission)
Document 8: Santa Rosa, California: Santa Rosa (lit. Spanish for ``Saint Rose '') is a city in and the county seat of Sonoma County, in California's Wine Country. Its estimated 2016 population was 175,155. Santa Rosa is the largest city in California's Redwood Empire, Wine Country and the North Bay; the fifth most populous city in the San Francisco Bay Area after San Jose, San Francisco, Oakland, and Fremont; and the 28th most populous city in California.
Document 9: Auckland: In October 2010, Manukau City mayor Len Brown was elected mayor of the amalgamated Auckland Council. He was re-elected for a second term in October 2013. Brown did not stand for re-election in the 2016 mayoral election, and was succeeded by successful candidate Phil Goff in October 2016. Twenty councillors make up the remainder of the Auckland Council governing body, elected from thirteen electoral wards.
Document 10: Rosenberg's Department Store: Rosenberg's Department Store is located at Fourth and D Streets in downtown Santa Rosa, California. The structure is the most significant example of the Streamline Moderne style in Santa Rosa, and was the tallest building in the city for many years.
Document 11: Havana: The current mayor of Havana ("President of the People's Power Provincial Assembly") is Marta Hernández Romero, she was elected on March 5, 2011.
Document 12: Santa Rosa, California: Santa Rosa is a city in and the county seat of Sonoma County, California, United States. Its estimated 2014 population was 174,170. Santa Rosa is the largest city in California's Redwood Empire, Wine Country and the North Bay; the fifth most populous city in the San Francisco Bay Area after San Jose, San Francisco, Oakland, and Fremont; and the 28th most populous city in California.
Document 13: Bobbit Carlos: Jose Emmanuel Lozada Carlos (born December 25, 1957), also known as Bobbit Carlos, is the former Representative of the First District of Valenzuela City to House of Representatives of the Philippines. He also served as the mayor of the city from 1995-2004 and vice mayor from 1992-1995.
Document 14: Rosa Rosales: Rosa Rosales is an American political activist. She served as the 45th national president of the League of United Latin American Citizens, the largest and oldest Hispanic civil rights organization in the United States, from 2002–2010. Rosales advocates for Hispanics across the country on issues of education, health, housing, civil rights, and many other issues affecting Hispanics.
Document 15: Christina Olague: Olague was appointed to the post by mayor Ed Lee in the wake of her predecessor Ross Mirkarimi's election to be sheriff of San Francisco. However, she was defeated by challenger London Breed in the San Francisco Board of Supervisors elections, 2012. She was the first openly bisexual person to serve as a San Francisco Supervisor.
ground_truth: Sonoma County
sub_queries: Arlene B. Arcillas >> place of birth Answer: Santa Rosa
what part of california is Santa Rosa in Answer: Sonoma County