Question: What country is the Portland Mills Covered Bridge located in?

full_context: Document 1: Sugar Creek Township, Parke County, Indiana: Sugar Creek Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 322 and it contained 154 housing units. The township includes the north half of Turkey Run State Park.
Document 2: Spring Creek Correctional Center: Spring Creek Correctional Center is an Alaska Department of Corrections maximum security prison for men located in Seward, Alaska, United States. The prison is located approximately south of Anchorage. The prison is located on about of land surrounded by national parks. The prison capacity consists of over 500 inmates and 97 correctional officers. Built as a decentralized campus, the prison construction was completed in 1988 at a cost of $44,678,000. A large portion of the prisoner population consists of "hard core" felons who committed violent crimes, such as murder. The Alaska DOC says that these prisoners "will probably spend the rest of their life in prison." Spring Creek also houses prisoners who committed less serious crimes like assault and burglary and usually have sentences from three years to ten years.
Document 3: Penn Township, Parke County, Indiana: Penn Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 810 and it contained 368 housing units.
Document 4: Rockville Correctional Facility: Rockville Correctional Facility is a state prison located in Adams Township, Parke County, one mile (1.6 km) northwest of Rockville, Indiana. A part of the Indiana Department of Corrections, it is the largest state prison for women in Indiana with approximately 1,200 women. Although it is classified as a medium-security prison, it has inmates of all security levels.
Document 5: Portland Mills Covered Bridge: The Portland Mills Covered Bridge is the second oldest covered bridge in Parke County, Indiana, being built the same year as the Crooks Covered Bridge. It is a single span Burr Arch Truss covered bridge that was built by Henry Wolf in 1856.
Document 6: Jackson Township, Parke County, Indiana: Jackson Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 737 and it contained 475 housing units.
Document 7: Roll, Indiana: Roll (pronounced "r-awl', rhymes with “fall”) is an unincorporated American community in Washington Township, Blackford County, Indiana. Nearly all of the community's businesses have been closed for years. Although the Blackford County Historical Society lists Roll as a ghost town, homes are still maintained in the area, and it is still listed as a populated place by the U.S. Geological Survey. The rural community is located on Indiana State Road 18, about one mile west of its intersection with Indiana State Road 3.
Document 8: Adams Township, Parke County, Indiana: Adams Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 5,825 and it contained 2,062 housing units.
Document 9: Rockville, Indiana: Rockville is a town in Adams Township, Parke County, in the U.S. state of Indiana. The population was 2,607 at the 2010 census. The town is the county seat of Parke County. It is known as "The Covered Bridge Capital of the World".
Document 10: Laughery Creek Bridge: The Laughery Creek Bridge is a truss bridge on the border of Dearborn County, Indiana, and Ohio County, Indiana. It crosses Laughery Creek. This bridge was built in 1878. The Wrought Iron Bridge Company, a prolific late 19th-century bridge company, constructed the bridge. The bridge is seated on stone abutments. The deck surface is not original and is currently concrete. The bridge, nearly 300 feet in length, is a single span pin connected triple intersection Whipple through truss, and is the only example in the world of this truss type. The name bridge's nickname, "Triple Whipple Bridge" is a play on words. The double-intersection Pratt, which was called the Whipple truss configuration, was a far more common variation of the standard Pratt configuration. Since the Laughery Creek Bridge's members have three intersections instead of two, this gives rise to the "Triple Whipple" name. This bridge was listed on the National Register of Historic Places in 1976.
Document 11: Kurtz's Mill Covered Bridge: The Kurtz's Mill Covered Bridge is a covered bridge that spans Mill Creek in the Lancaster County Park in Lancaster County, Pennsylvania, United States. The bridge is also known as the County Park Covered Bridge, Baer's Mill Covered Bridge, Isaac Baer’s Mill Bridge, Keystone Mill Covered Bridge, Binder Tongue Carrier Covered Bridge, and Mill 2A Covered Bridge. The bridge is accessible to road traffic from within the park.
Document 12: Washington Township, Parke County, Indiana: Washington Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 1,302 and it contained 457 housing units.
Document 13: Brookville, Indiana: Brookville is a town in Brookville Township, Franklin County, Indiana, United States. The population was 2,596 at the 2010 census. The town is the county seat of and the largest community entirely within Franklin County.
Document 14: Hokes Mill Covered Bridge: Hokes Mill Covered Bridge is a historic covered bridge at Ronceverte, Greenbrier County, West Virginia. It was built between 1897 and 1899, and measures 12 feet wide and 81.6 feet long. It has red board-and-batten siding and a standing seam metal roof. It is one of two remaining covered bridges in Greenbrier County, the other being Herns Mill Covered Bridge.
Document 15: Phillips Covered Bridge: The Phillips Covered Bridge is southeast of Montezuma, Indiana in Parke County, Indiana and crosses Rocky Run, also known as Big Pond Creek. Unlike the rest of the bridges of Parke County, it is a single span King Post bridge structure, having no arches, that was built by Joseph A. Britton in 1909.
ground_truth: U.S.
sub_queries: Portland Mills Covered Bridge >> located in the administrative territorial entity Answer: Parke County
Parke County >> capital Answer: Rockville
Rockville >> country Answer: U.S.