Question: What's the capital of the county where Shelly Mars was born?

full_context: Document 1: Eric Staller: 1971 Staller completed a Bachelor Degree in Architecture at the University of Michigan. Toward the end of his tenure at the University of Michigan, Staller began to create sculptures and performance arts. Merce Cunningham and John Cage had performed at the university at that time and praised artwork that Staller had created. They were the first professional performers to make Staller realize that he was truly an artist. In the fall of 1971, Staller moved to New York City and lived there until 1991. He had purchased an 1829-vingtage Lutheran Church, located in Lyons, PA. Staller used and renovated the church as a weekend retreat until 1991, then decided to move out of New York to live full-time in Lyons, PA.
Document 2: Marcellus Hall: Marcellus Hall was born in Minneapolis, Minnesota, and graduated with a Bachelor of Fine Arts degree from the Rhode Island School of Design where he also learned guitar and harmonica.
Document 3: Lorain City School District: The Lorain City School District is a public school district serving the city of Lorain, Ohio, which is located 25 miles west of Cleveland. The district is the tenth largest urban school district in the State of Ohio.
Document 4: WAEY: WAEY is a Southern Gospel formatted broadcast radio station licensed to Princeton, West Virginia, serving Princeton and Mercer County, West Virginia. WAEY is owned and operated by Princeton Broadcasting, Inc.
Document 5: Celina City School District: The Celina City School District is a public school district in Mercer County, Ohio, United States, based in Celina, Ohio.
Document 6: Shelly Mars: Shelly Mars (born 1960, Celina, Ohio) is a performance artist, actor and printmaker based in New York. She studied at University of California, Santa Cruz and has a B.F.A. in theater from the California Institute of the Arts. She also studied at American Conservatory Theater (ACT) in San Francisco.
Document 7: WKJV-LP: WKJV-LP is a Southern Gospel and Religious formatted broadcast radio station licensed to Bristol, Virginia, serving the twin cities of Bristol in Virginia and in Tennessee. WKJV-LP is owned and operated by Belle Meadows Baptist Church.
Document 8: Madeira High School: Madeira High School is the public high school in the city of Madeira, Ohio near Cincinnati. Madeira High School is the only high school in the Madeira City Schools District.
Document 9: Lucy Shelton: Lucy Shelton is an American soprano best known for her performance of contemporary music. She graduated from The Putney School in 1961 and Pomona College in 1965.
Document 10: Bill Marsilii: Marsilii was born in Wilmington, Delaware. After graduating with a degree in drama from New York University's Tisch School of the Arts, where he attended Circle in the Square Theatre School, he founded a theater company called Bad Neighbor and performed solo comedy in Manhattan.
Document 11: WJYA: WJYA is a Contemporary Christian formatted broadcast radio station licensed to Emporia, Virginia, serving Emporia, Lawrenceville, and South Hill in Virginia and Roanoke Rapids in North Carolina. WJYA is owned and operated by Baker Family Stations.
Document 12: Mariemont City School District: The Mariemont City School District is located east of Cincinnati, Ohio, United States and includes the villages of Fairfax, Terrace Park, Mariemont, and the unincorporated areas of Plainville and Williams' Meadow. The district can trace its founding to April 14, 1879.
Document 13: Marietta City School District: The Marietta City School District is a public school district that serves students in grades K-12 who live in and around Marietta, a city in Washington County, Ohio, United States. The district has four elementary schools (Harmar, Phillips, Putnam, and Washington), one middle school (Marietta Middle School), and one high school (Marietta High School), and serves the communities of Marietta, Reno, Devola, Harmar, and Oak Grove.
Document 14: WKOY-FM: WKOY-FM is an American classic rock-formatted broadcast radio station licensed to Princeton, West Virginia, serving Princeton, West Virginia, Bluefield, Virginia and Bluefield, West Virginia. WKOY-FM is owned and operated by Alpha Media.
Document 15: WVYC: WVYC is a college radio station licensed by the Federal Communications Commission (FCC) to serve the community of York, Pennsylvania, United States. The station broadcasts from the Robert V. Iosue Student Union Building on the campus of York College of Pennsylvania in York.
ground_truth: Princeton
sub_queries: Shelly Mars >> place of birth Answer: Celina
Celina >> located in the administrative territorial entity Answer: Mercer County
Mercer County >> capital Answer: Princeton