Question: In which county was Todd Sears born?

full_context: Document 1: Todd Burns: Burns attended Oral Roberts University in Tulsa, Oklahoma, earning first-team All-America honors before being drafted by the Oakland Athletics in the 7th round of the 1984 MLB amateur draft. He played for the A's from 1988 to 1991, and would also play for the Texas Rangers (1992–1993), and St. Louis Cardinals (1993). He was nicknamed "The Mad Hatter" because of his habit of frantically tugging at the bill of his cap and re-adjusting it prior to every pitch as well as "Third Degree" for his penchant of giving up runs near the end of his career.
Document 2: Zach Sorensen: Zach Hart Sorensen (born January 3, 1977 in Salt Lake City, Utah) is a former Major League Baseball second baseman and shortstop.
Document 3: Derrick Seaver: Derrick Seaver is a former member of the Ohio House of Representatives, representing the 78th District from 2001 to 2006. His election in 2000 was notable as he was elected to office at 18 years of age.
Document 4: Matt Macri: Matthew Michael Macri (born May 29, 1982 in Des Moines, Iowa) is a Major League Baseball player who plays third base.
Document 5: Colo, Iowa: Colo is a city in Story County, Iowa, United States. The population was 876 at the 2010 census. It is part of the Ames, Iowa Metropolitan Statistical Area, which is a part of the larger Ames-Boone, Iowa Combined Statistical Area.
Document 6: Middletown, Iowa: Middletown is a city in Des Moines County, Iowa, United States. The population was 318 at the 2010 census. It is part of the Burlington, IA–IL Micropolitan Statistical Area.
Document 7: Indianola, Iowa: Indianola is a city in Warren County, Iowa, United States, 18 miles south of Des Moines, Iowa. The population was 14,782 at the 2010 census. It is the county seat of Warren County.
Document 8: Kalona, Iowa: Kalona is a city in Washington County, Iowa, United States. It is part of the Iowa City, Iowa Metropolitan Statistical Area. The population was 2,363 at the 2010 census. Kalona is the second largest city in Washington County.
Document 9: Dave Collins: Collins is one of three players to have made it to the major leagues who played for the Rapid City Post 22 American Legion baseball program in Rapid City, South Dakota. The other two are Kelvin Torve and Mark Ellis. All three were graduates of Stevens High School.
Document 10: Des Moines metropolitan area: The Des Moines metropolitan area, officially known as the Des Moines -- West Des Moines, IA Metropolitan Statistical Area (MSA), consists of five counties in central Iowa, United States: Polk, Dallas, Warren, Madison, and Guthrie. The 2010 census population of these counties was 569,633, and the 2017 estimated population was 645,911.
Document 11: Todd Claus: Todd W. Claus (born March 24, 1969) is an American baseball scout. He also has been an infielder, coach, manager and advance scout in professional baseball, and an assistant coach in college baseball. A switch hitter who threw right-handed, Claus stands tall and weighs .
Document 12: Saylorville, Iowa: Saylorville is a census-designated place (CDP) in Polk County, Iowa, United States. The population was 3,301 at the 2010 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. The Saydel Community School District is located in this area. The unincorporated community of Marquisville is in this area.
Document 13: Principal Park: Principal Park, formerly Sec Taylor Stadium, is a minor league baseball stadium in Des Moines, Iowa. It is the home field of the Pacific Coast League's Iowa Cubs.
Document 14: Todd Sears: Todd Andrew Sears (born October 23, 1975 in Des Moines, Iowa) is a former Major League Baseball first baseman for the Minnesota Twins and San Diego Padres.
Document 15: Corydon, Iowa: Corydon is a city in Wayne County, Iowa, United States. The population was 1,585 in the 2010 census, a decline from 1,591 in the 2000 census. It is the county seat of Wayne County.
ground_truth: Warren County
sub_queries: Todd Sears >> place of birth Answer: Des Moines
Des Moines >> located in the administrative territorial entity Answer: Warren County