Question: What county contains the city where Winthrop Ballpark is located?

full_context: Document 1: Houck Stadium: The stadium used to be open on both the east and west side. Today, it is open only on the east side. On the west end of the stadium, where KRCU once stood, is a brand new, 5-story residence hall for Southeast students, with some of the rooms looking out over the stadium. The stadium is flanked on the southwest side by Houck Fieldhouse, which houses the Southeast Missouri State volleyball team.
Document 2: Charleston, South Carolina: Charleston is the oldest and largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston -- North Charleston -- Summerville Metropolitan Statistical Area. The city lies just south of the geographical midpoint of South Carolina's coastline and is located on Charleston Harbor, an inlet of the Atlantic Ocean formed by the confluence of the Ashley and Cooper rivers. Charleston had an estimated population of 134,385 in 2016. The estimated population of the Charleston metropolitan area, comprising Berkeley, Charleston, and Dorchester counties, was 761,155 residents in 2016, the third - largest in the state and the 78th - largest metropolitan statistical area in the United States.
Document 3: Bethpage Ballpark: Bethpage Ballpark is a 6,002-seat baseball park in Central Islip, New York that serves as the home of the Long Island Ducks, an independent minor league baseball team that is a member of the Atlantic League of Professional Baseball. Its first regular season game took place on May 14, 2000, when the Ducks played host to the Aberdeen Arsenal. The game was the first in the history of both franchises, as they both entered the Atlantic League at the same time. Bethpage Ballpark hosted the 2002, 2010, and 2018 Atlantic League All-Star Games.
Document 4: Winthrop Ballpark: The Winthrop Ballpark is a baseball venue in Rock Hill, South Carolina. It is home to the Winthrop Eagles baseball team of the NCAA Division I Big South Conference. The venue has a capacity of 1,989 spectators.
Document 5: Charleston, South Carolina: The Charleston-North Charleston-Summerville Metropolitan Statistical Area consists of three counties: Charleston, Berkeley, and Dorchester. As of the 2013 U.S. Census, the metropolitan statistical area had a total population of 712,239 people. North Charleston is the second-largest city in the Charleston-North Charleston-Summerville Metropolitan Statistical Area and ranks as the third-largest city in the state; Mount Pleasant and Summerville are the next-largest cities. These cities combined with other incorporated and unincorporated areas along with the city of Charleston form the Charleston-North Charleston Urban Area with a population of 548,404 as of 2010. The metropolitan statistical area also includes a separate and much smaller urban area within Berkeley County, Moncks Corner (with a 2000 population of 9,123).
Document 6: Plumeri Park: Plumeri Park is the College of William & Mary Tribe baseball team's home stadium located in Williamsburg, Virginia. It has been in use since 1999. Joseph J. Plumeri II, a William & Mary alumnus (Class of 1966) and former Tribe baseball player who is Chairman & CEO of Willis Group Holdings, funded most of the construction costs, thus the park is named after him. Plumeri Park is a baseball-only facility and it includes a state of the art scoreboard, a 10-foot artificial turf halo behind the home plate area, locker rooms, a press box, concession space, a grandstand, and covered and outdoor batting cages. It seats up to 1,000 people and has stadium lights, enabling the Tribe to host night games. The park's inaugural game was on March 20, 1999. The Tribe hosted the Penn State Nittany Lions and won 16-10.
Document 7: FAU Baseball Stadium: FAU Baseball Stadium is a baseball venue located in Boca Raton, Florida, United States. It has been home to the Florida Atlantic Owls baseball team of the NCAA Division I Conference USA since 1991. The venue has a capacity of 2,000 spectators and features Triple-A-quality lighting.
Document 8: Darlington County, South Carolina: Darlington County is a county in the U.S. state of South Carolina. As of 2016, its estimated population was 67,234. Its county seat is Darlington. Hartsville is the largest city in the county. Darlington County is home to the Darlington Raceway, which hosts the annual NASCAR Southern 500. Darlington County is also home to Coker College in Hartsville. Darlington County was named by an act in March 1785.
Document 9: Greenville County, South Carolina: Greenville County is a county located in the state of South Carolina, in the United States. As of the 2010 census, the population was 451,225, making it the most populous county in the state. In 2017, the estimated population of the county was 506,837. Its county seat is Greenville. The county is also home to the Greenville County School District, the largest school system in South Carolina. County government is headquartered at Greenville County Square.
Document 10: Cleveland S. Harley Baseball Park: Cleveland S. Harley Baseball Park is a baseball venue in Spartanburg, South Carolina, USA. It is home to the University of South Carolina Upstate Spartans college baseball team of the NCAA's Division I Atlantic Sun Conference. It opened on February 1, 2004, when Upstate swept a double header against Tusculum College. The facility has a capacity of 500 spectators.
Document 11: Newport, South Carolina: Newport is a census-designated place in York County, South Carolina. Most of Newport is annexed into the city of Rock Hill, while parts are still located in unincorporated York County, but Newport is still considered to be a census-designated place. The census of 2010 showed the population to be 4,136. During the 2000 Census, the population was 4,033.
Document 12: Rock Hill, South Carolina: Rock Hill is the largest city in York County, South Carolina, United States and the fifth-largest city in the state. It is also the fourth-largest city of the Charlotte metropolitan area, behind Charlotte, Concord, and Gastonia (all located in North Carolina, unlike Rock Hill). As of the 2010 Census, the population was 66,154. In 2016, the population had increased to 72,937.
Document 13: Stephen Schott Stadium: Stephen Schott Stadium, or Schott Stadium for short, is the home of the Santa Clara University baseball team, a Division I Baseball team of the NCAA's West Coast Conference. The stadium, which opened in 2005, is located in Santa Clara, California, USA.
Document 14: Mecklenburg County, North Carolina: Mecklenburg County is a county located on the border in the southwestern part of the state of North Carolina, in the United States. As of the 2010 census, the population was 919,628. It increased to 1,034,070 as of the 2015 estimate, making it the most populous county in North Carolina and the first county in the Carolinas to surpass 1 million in population. Its county seat and largest city is Charlotte.
Document 15: USF Baseball Stadium: USF Baseball Stadium is a baseball venue located in Tampa, Florida, United States. It is home to the University of South Florida Bulls college baseball team of the Division I American Athletic Conference (The American). The facility has a capacity of 3,211 spectators. It replaced Red McEwen Field as the home of USF baseball.
ground_truth: York County
sub_queries: In which state is Winthrop Ballpark located? Answer: Rock Hill
Rock Hill >> located in the administrative territorial entity Answer: York County