Question: Mills River is a tributary of the river that starts in what Transylvania County, North Carolina town?

Context paragraphs:
Silvermont (Brevard, North Carolina): Silvermont is a historic home located at Brevard, Transylvania County, North Carolina.  It was built in 1916-1917, and is a two-story, five bay, Colonial Revival style brick dwelling with a gambrel roof.  Also on the property is a one-story, stone veneer cottage.  It has a rear ell, two-story front portico supported by columns with Corinthian order capitals, one-story wraparound porch, porte cochere, and sunroom.  The house and grounds were donated to Transylvania County in 1972, and serve as a public recreation center.

Wildwood, North Carolina: Wildwood, North Carolina is a small unincorporated community centered on the Wildwood Road, just west of the Morehead City, North Carolina town limits along US Highway 70, in Carteret County, North Carolina.  Newport, North Carolina is the next closest town.

Mills River, North Carolina: Mills River is a town located in Henderson County, North Carolina (USA).  The town took its name from the nearby confluence of the Mills River and French Broad River.  It is part of the Asheville Metropolitan Statistical Area.  It was incorporated into a town in June, 2003.  Sierra Nevada opened a brewery in Mills River in 2014.

Transylvania County Airport: Transylvania County Airport (FAA LID: 3NR3) is a public use airport in Transylvania County, North Carolina, United States.  It is located four nautical miles (7 km) east of the central business district of Brevard.

Mills River (North Carolina): The Mills River is located in Transylvania and Henderson counties, North Carolina, United States is a tributary of the French Broad River.  The river flows out of the Pisgah Ranger District of the Pisgah National Forest in two forks: the North Fork, which drains the slopes just south of the Blue Ridge Parkway between Asheville and Mount Pisgah, and the South Fork, which drains the area of the Pisgah Ranger District just east of the Cradle of Forestry in America, including the slopes of Black Mountain.  The Mills River flows into the French Broad River northwest of Hendersonville between NC 191 and Interstate 26.

French Broad River: The French Broad River flows 218 mi from near the town of Rosman in Transylvania County, North Carolina, into the state of Tennessee.  Its confluence with the Holston River at Knoxville is the beginning of the Tennessee River.  The river flows through the counties of Transylvania, Buncombe, Henderson, and Madison in North Carolina, and Cocke, Jefferson, Sevier, and Knox in Tennessee, and drains large portions of the Pisgah National Forest and the Cherokee National Forest.

Transylvania County Courthouse: Transylvania County Courthouse is a historic courthouse building located at Brevard, Transylvania County, North Carolina.  It was built in 1873, and is a two-story, "T"-plan Italianate style brick building with a hipped roof.  It has a rear addition built in the early-20th century.  The front facade features a projecting three-story tower topped by a concave mansard roof.

Gorges State Park: Gorges State Park is a 7709 acre North Carolina state park in Transylvania County, North Carolina in the United States.  The land, along Jocassee Gorges, was purchased by the state from Duke Energy Corporation in 1999.  It is North Carolina's westernmost state park and one of the state's newest.  The park is adjacent to part of the Pisgah National Forest and the N.C. Wildlife Resources Commission's Toxaway Game Land.  Gorges State Park provides the principle access to the Horsepasture River on these adjoining public lands.

Mills River Chapel: Mills River Chapel, also known as Mills River United Methodist Church, is a historic Methodist chapel located near Mills River, Henderson County, North Carolina.  It was built in 1860–1861, and is a one-story, rectangular, vernacular Greek Revival-style church.  It features a front portico with four, square, recessed panel wooden columns.  Adjacent to the church is the contributing church cemetery, with gravestones dating from as early as 1824.

Brevard, North Carolina: Brevard is a city in Transylvania County, North Carolina, United States, with a population of 7,609 as of the 2010 Census.  It is the county seat of Transylvania County.

Supporting paragraphs: Mills River (North Carolina) French Broad River
Answer: Rosman