Question: What's the capital of the county where Fourth Crossing is located?

full_context: Document 1: Hudson County Courthouse: The courthouse was used as the primary seat of government for Hudson County from its opening on September 20, 1910 until the construction of the Hudson County Administration Building in 1966. The courthouse was vacant for many years and was scheduled for demolition. The building was added to the National Register of Historic Places on August 25, 1970. Restoration began in the mid-1970s, and the building was reopened in 1985. In 1984, the Hudson County Board of Chosen Freeholders renamed the building in honor of Supreme Court Justice William J. Brennan Jr. The restoration of the courthouse was acknowledged by a Victorian Society in America Preservation Award in 1988.
Document 2: Four Corners, Contra Costa County, California: Four Corners is an unincorporated community in Contra Costa County, California, United States. It is located north-northeast of Walnut Creek, at an elevation of 49 feet (15 m).
Document 3: Jackson County Courthouse (Jacksonville, Oregon): The Jackson County Courthouse is a former county courthouse in Jacksonville, Oregon, United States, built in 1883. The courthouse is a contributing property of the Jacksonville Historic District, which is listed on the National Register of Historic Places (NRHP). It was formerly the Jacksonville Museum owned by Jackson County and operated by the Southern Oregon Historical Society (SOHS), which also managed several other historic properties in Jacksonville. The museum in the courthouse closed in 2006 because of lack of funding. Ownership of the historic courthouse was transferred to the City of Jacksonville in 2012. The SOHS still operates Hanley Farm in Central Point and a research library in Medford.
Document 4: Deer Crossing, California: Deer Crossing is an unincorporated community in Fresno County, California. It is located southeast of Dunlap, at an elevation of 3150 feet (960 m).
Document 5: Fourth Crossing, California: Fourth Crossing (formerly, Foremans) is an unincorporated community in Calaveras County, California. It lies at an elevation of 922 feet (281 m) and is located on State Route 49 at . The community is in ZIP code 95248 and area code 209.
Document 6: Sweeneys Crossing, California: Sweeneys Crossing (also, Sweeneys) is an unincorporated community in El Dorado County, California. It is located on the North Fork of the Cosumnes River south-southeast of Camino, at an elevation of 2080 feet (634 m).
Document 7: Old Meigs County Courthouse: The Old Meigs County Courthouse is a historic former government building in the small community of Chester, Ohio, United States. Erected in the early nineteenth century, the courthouse served multiple purposes for the surrounding community in its early years, but it operated as a courthouse for less than twenty years before being abandoned in favor of another courthouse in another community. Following a restoration in the 1950s, it was designated a historic site in the 1970s along with an adjacent school; the two buildings are operated together as a museum. It is Ohio's oldest extant building constructed as a courthouse.
Document 8: Old Salem County Courthouse: Built in 1735, this building is the oldest active courthouse in New Jersey and is the second oldest courthouse still in continuous use in the United States. It was expanded in 1818 and 1908.
Document 9: Tombstone Courthouse State Historic Park: Tombstone Courthouse State Historic Park is a state park of Arizona in the United States. Located in Tombstone, the park preserves the original Cochise County courthouse. The two-story building, constructed in 1882 in the Victorian style, is laid out in the shape of a cross and once contained various county offices, including those of the sheriff, recorder, treasurer, and the Board of Supervisors as well as courtrooms and a jail. Inside, the courthouse contains a museum with numerous artifacts from the town's history while outside, a replica gallows has been constructed in the courtyard to mark the spot where seven men were hanged for various crimes. The park was one of the first to be designated as a state park and in 1959 was the first to open following the 1957 establishment of the Arizona State Parks Board.
Document 10: Forest Home, Amador County, California: Forest Home is a former settlement in Amador County, California. It was located west of Plymouth, at an elevation of 581 feet (177 m). It still appeared on USGS maps as of 1944.
Document 11: Texas Prison Museum: The non-profit museum features the history of the prison system in Texas (Huntsville is the home of the Texas Department of Criminal Justice and several prisons including the Ellis Unit which previously housed death row, and Huntsville Unit which houses the execution chamber). There are many different artifacts in the museum, including an electric chair named "Old Sparky" that was formerly used from 1924 to 1964 as the primary means of execution.
Document 12: Calaveras County Courthouse: The Calaveras County Courthouse is a historic courthouse building in San Andreas, California. The brick courthouse was built in 1867 and contained the county's courtroom, jail, and sheriff's office; until 1888, executions were also conducted in the building. The county's Hall of Records was built in front of the courthouse in 1893; the two buildings nearly touch and are considered part of the same complex. The building's jail held outlaw Black Bart, a notorious Northern California highwayman, during his 1883 trial. In 1966, the county moved its courthouse to a new building; the old courthouse is now the Calaveras County Museum, which is operated by the Calaveras County Historical Society.
Document 13: Paloma, California: Paloma (Spanish for "dove"; formerly, Fosteria and Frenchman's Ranch) is an unincorporated community in Calaveras County, California. It lies at an elevation of 1362 feet (415 m) and is located at . The community is in ZIP code 95252 and area code 209.
Document 14: Ramsey Crossing, California: Ramsey Crossing is an unincorporated community in Placer County, California. Ramsey Crossing is located in Long Canyon, north of Devil Peak. It lies at an elevation of 3681 feet (1122 m).
Document 15: Calaveras County Airport: Calaveras County Airport , also known as Maury Rasmussen Field, is a public airport located four miles (6 km) southeast of the central business district of San Andreas, in Calaveras County, California, United States. It is owned by the County of Calaveras.
ground_truth: San Andreas
sub_queries: Fourth Crossing >> located in the administrative territorial entity Answer: Calaveras County
Calaveras County >> capital Answer: San Andreas