Question: What country of origin does South Branch Dead River and Franklin County, Maine have in common?

Context paragraphs:
West Branch Moose River (Maine): The West Branch Moose River is a short tributary of the South Branch Moose River in Franklin County, Maine.  Its source ( ) is on Caribou Mountain in Merrill Strip (Maine Township 2, Range 7, WBKP), about 2000 ft from the Canada–United States border, which runs along the height of land between the watersheds of the Kennebec River in Maine and the Chaudière River in Quebec.  From there, the river runs 5.9 mi northeast to its confluence with the Moose River's South Branch in Skinner (T1, R7, WBKP).

North Branch Dead River: The North Branch Dead River is a 19.3 mi tributary of the Dead River in Franklin County, Maine.  It is paralleled by Maine State Route 27.

Dead River (Oregon): The Dead River is a short tributary of the Willamette River east of Corvallis in the U.S. state of Oregon.  It begins at the lower end of Colorado Lake in Linn County and flows generally east along the south side of Truax Island, which separates the Dead River from the main stem Willamette.  The Dead River then turns north and enters the larger river after crossing into Benton County at Half Moon Bend northeast of Orleans.

Dead River (Kennebec River): The Dead River, sometimes called the West Branch, is a 42.6 mi river in central Maine in the United States.  Its source is Flagstaff Lake, where its two main tributaries, South Branch Dead River and North Branch Dead River, join ( ).  It flows generally east to join the Kennebec River at The Forks, Maine.

South Branch Kishwaukee River: The South Branch Kishwaukee River is a 63.6 mi tributary of the Kishwaukee River in northern Illinois.  The South Branch is the main branch of the Kishwaukee River, joining it 10.6 mi above its confluence with the Rock River.  The South Branch flows through DeKalb County; in 2007 flooding along the tributary inundated areas of DeKalb County and Sycamore, Illinois.

South Branch Dead River: The South Branch Dead River is a 26.3 mi tributary of the Dead River in Franklin County, Maine.

South Branch Depot, West Virginia: South Branch Depot also known as South Branch is an unincorporated community in Hampshire County in the U.S. state of West Virginia.  Originally known as Forks of Potomac because of its proximity to the confluence of the North and South Branches of the Potomac River and then later in the early 20th century as French's Station and then simply South Branch, South Branch Depot served as a depot and post office on the Baltimore & Ohio Railroad since the railroad was constructed there in the 1840s.  Today, South Branch Depot may only be reached from Levels by way of Frenches Station Road (County Route 5/7).

Franklin County, Maine: Franklin County is a county located in the state of Maine, in the United States.  As of the 2010 census, the population was 30,768, making it the second-least populous county in Maine.  Its county seat is Farmington.  The county was established on May 9, 1838 and named for Benjamin Franklin.

Flagstaff Lake (Maine): Flagstaff Lake is located in Somerset County and Franklin County, Maine in the United States.  The North Branch Dead River and South Branch Dead River join in the lake, forming the Dead River.

South Branch Valley Railroad: The South Branch Valley Railroad (reporting mark SBVR) consists of a 52.4 mile (84.33 km) length of railroad in the U.S. state of West Virginia extending north along the South Branch Potomac River from Petersburg to the CSXT mainline at Green Spring adjacent to the Potomac River.  At Green Spring, the CSXT mainline connects the SBVR to Cumberland, Maryland to the west and Martinsburg, West Virginia to the east.  SBVR has been owned and operated by the West Virginia State Rail Authority (SRA) since it was sold by the Baltimore & Ohio Railroad on October 11, 1978.  Upon purchasing the B&O's South Branch line, West Virginia became the first state in the United States to both own and operate a commercial freight railroad.  In 1985, major flooding of the South Branch Valley destroyed most of the rail line, including all three bridges that crossed the South Branch Potomac River.  Despite talk of shutting down the railroad after the flood, reconstruction began two years later.

Supporting paragraphs: South Branch Dead River Franklin County, Maine
Answer: United States