Question: The 1915 Oregon Agricultural Aggies football team played their home games at Bell Field in a city in central western Oregon, that is the county seat of what county?

full_context: Document 1: Oregon National Primate Research Center: The Oregon National Primate Research Center (ONPRC) is one of seven federally funded National Primate Research Centers in the United States and has been affiliated with Oregon Health and Science University (OHSU) since 1998. The center is located on 166 acre of land west of Portland, Oregon, in Hillsboro. Originally known as the Oregon Regional Primate Research Center (ORPRC), it was the first of the original seven primate centers established by the National Institutes of Health (NIH). The research center is administered and funded by the National Center for Research Resources, receiving $11 million in federal grants annually.
Document 2: Portland, Oregon: Portland ( ) is the largest city in the U.S. state of Oregon and the seat of Multnomah County. It is a major port in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia Rivers. The city covers 145 sqmi and had an estimated population of 639,863 in 2016, making it the 26th most populous city in the United States. Approximately 2,424,955 people live in the Portland metropolitan statistical area (MSA), the 25th most populous MSA in the United States. Its Combined Statistical Area (CSA) ranks 18th with a population of 3,160,488. Roughly 60% of Oregon's population resides within the Portland metropolitan area.
Document 3: Josephine County, Oregon: Josephine County is a county in the U.S. state of Oregon. As of the 2010 census, the population was 82,713. The county seat is Grants Pass. The county is probably named after a stream in the area called Josephine Creek, which in turn is probably named after Virginia Josephine Rollins Ort. Josephine County comprises the Grants Pass, OR Metropolitan Statistical Area, which is included in the Medford-Grants Pass, OR Combined Statistical Area.
Document 4: 1913 Oregon Agricultural Aggies football team: The 1913 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1913 college football season. In their first season under head coach E. J. Stewart, the Aggies compiled a 3–2–3 record and were outscored by their opponents by a combined total of 75 to 59. Against major opponents, the Aggies lost to Washington (0–47), tied Oregon (10–10), and defeated Washington State (10–2) and Idaho (3–0). The team played its home games at Bell Field in Corvallis, Oregon. Otto Sitton was the team captain.
Document 5: Beaverton, Oregon: Beaverton is a city in Washington County, in the U.S. state of Oregon. The city center is 7 mi west of downtown Portland in the Tualatin River Valley.
Document 6: 1916 Oregon Agricultural Aggies football team: The 1916 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) in the Pacific Coast Conference (PCC) during the 1916 college football season. In their first season under head coach Joseph Pipal, the Aggies compiled a 4–5 record (0–2 against PCC opponents), finished in third place in the PCC, and were outscored by their opponents by a combined total of 112 to 92. The team played its home games at Bell Field in Corvallis, Oregon. Brewer Billie was the team captain.
Document 7: Benton County State Bank Building: The Benton County State Bank Building, also known as The Madison Building, located in Corvallis, Oregon, is listed on the National Register of Historic Places.
Document 8: 1909 Oregon Agricultural Aggies football team: The 1909 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1909 college football season. In their first and only season under head coach Sol Metzger, the Aggies compiled a 4–2–1 record and outscored their opponents by a combined total of 54 to 44. Against major opponents, the Aggies lost to Oregon (0–12) and Washington (0–18). The team played its home games at Bell Field in Corvallis, Oregon. Carl Wolf was the team captain.
Document 9: 1911 Oregon Agricultural Aggies football team: The 1911 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1911 college football season. In their first season under head coach Sam Dolan, the Aggies compiled a 5–2 record and outscored their opponents by a combined total of 119 to 49. Against major opponents, the Aggies lost to Washington (0–34) and defeated Washington State (6–0). The team played its home games at Bell Field in Corvallis, Oregon. Bird Howley was the team captain.
Document 10: 1914 Oregon Agricultural Aggies football team: The 1914 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1914 college football season. In their second season under head coach E. J. Stewart, the Aggies compiled a 7–0–2 record and outscored their opponents by a combined total of 172 to 15. Against major opponents, the Aggies defeated Washington State (7–0), Idaho (26–0), and USC (38–6), and played to a tie against Washington (0–0) and Oregon (3–3). The team played its home games at Bell Field in Corvallis, Oregon. James Shaw was the team captain.
Document 11: Burns, Oregon: Burns is a city in and the county seat of Harney County, in the U.S. state of Oregon. According to the 2010 census, the population was 2,806. Burns and the nearby city of Hines are home to about 60 percent of the people in the sparsely populated county, the largest in Oregon and the ninth largest in the United States.
Document 12: 1915 Oregon Agricultural Aggies football team: The 1915 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) in the Pacific Coast Conference (PCC) during the 1915 college football season. In their third and final season under head coach E. J. Stewart, the Aggies compiled a 5–3 record (0–2 against PCC opponents) and were outscored by their opponents by a combined total of 166 to 73. The team played its home games at Bell Field in Corvallis, Oregon. Gus Hofer was the team captain.
Document 13: 1912 Oregon Agricultural Aggies football team: The 1912 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1912 college football season. In their second season under head coach Sam Dolan, the Aggies compiled a 3–4 record and outscored their opponents by a combined total of 57 to 40. Against major opponents, the Aggies lost to Washington (3–9), Washington State (9–10), and Oregon (0–3). The team played its home games at Bell Field in Corvallis, Oregon. Tom E. May was the team captain.
Document 14: 1910 Oregon Agricultural Aggies football team: The 1910 Oregon Agricultural Aggies football team represented Oregon Agricultural College (now known as Oregon State University) as an independent during the 1910 college football season. In their first and only season under head coach George Schildmiller, the Aggies compiled a 3–2–1 record and were outscored by their opponents by a combined total of 43 to 27. Against major opponents, the Aggies defeated Washington State (9–3) and lost to Oregon (0–12) and Washington (0–22). The team played its home games at Bell Field in Corvallis, Oregon. James Evenden was the team captain.
Document 15: Corvallis, Oregon: Corvallis is a city in central western Oregon, United States. It is the county seat of Benton County and the principal city of the Corvallis, Oregon Metropolitan Statistical Area, which encompasses all of Benton County. As of the 2010 United States Census, the population was 54,462. Its population was estimated by the Portland Research Center to be 55,298 in 2013. Corvallis is the location of Oregon State University, a large Hewlett-Packard research campus, and Good Samaritan Regional Medical Center.
ground_truth: Benton County