Question: In what part of California is the city where Montgomery High School is located?

full_context: Document 1: 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 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: 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 4: Cardinal Newman High School (Santa Rosa, California): Cardinal Newman High School is an American Catholic high school located in Santa Rosa, California. The school was originally for boys, but shared some facilities with Ursuline High School for girls; it has been coeducational since Ursuline's closure in 2011. The current principal is Graham Rutherford. Its colors are Cardinal Red and Gold; its mascot is the cardinal. It is located in the Roman Catholic Diocese of Santa Rosa in California.
Document 5: Rosemont High School: Rosemont High School is a public high school located in Sacramento, California, USA. Designed by DLR Group, its completed buildings opened in 2003. Rosemont H.S. is part of the Sacramento City Unified School District.
Document 6: Carlmont High School: Carlmont High School is a public high school in Belmont, California, United States serving grades 9–12 as part of the Sequoia Union High School District. Carlmont is a California Distinguished School.
Document 7: Narragansett Regional High School: Narragansett Regional High School (NRHS) is a US public high school serving students from the towns of Templeton, Massachusetts and Phillipston, Massachusetts. The principal is Mandy H. Vasil. Vasil, previously principal of Millbury Jr./Sr. High, began her tenure with Narragansett on July 1, 2016. The vice principal is John Vancelette. The Narragansett Regional School District superintendent is Dr. Christopher Casavant. The school is located in Baldwinville, a village that is part of Templeton.
Document 8: 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 9: 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 10: Santa Rosa Rugby Club: The Santa Rosa Rugby Club is a men's rugby union team based in and around Santa Rosa, California. The club was founded in 1971. The team plays in the Northern California Rugby Football Union at the Division I level. The Santa Rosa Rugby Club won back to back national championships in 1994-95.
Document 11: Elsie Allen High School: Elsie Allen High School (EAHS) is a high school located in Santa Rosa, California at 599 Bellevue Ave. It is part of the Santa Rosa High School District, which is itself part of Santa Rosa City Schools. The primary feeder school is Cook Middle School. The school is named after Elsie Allen.
Document 12: Montgomery High School (Santa Rosa, California): Montgomery High School is a public high school located in Santa Rosa, California. It is part of the Santa Rosa High School District, which is itself part of Santa Rosa City Schools. The current principal is Randolph T. Burbank
Document 13: 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 14: 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 15: Piner High School: Piner High School (PHS) is a Public high school in Santa Rosa, California, United States. It is part of the Santa Rosa High School District, which is itself part of Santa Rosa City Schools.
ground_truth: Sonoma County
sub_queries: Montgomery High School >> location Answer: Santa Rosa
what part of california is Santa Rosa in Answer: Sonoma County