Question: What county is Kevin Tapani's birthplace located?

full_context: Document 1: 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 2: Kevin Tapani: Kevin Ray Tapani (born February 18, 1964 in Des Moines, Iowa) is a former Major League Baseball pitcher who played for the New York Mets, Minnesota Twins, Los Angeles Dodgers, Chicago White Sox, and Chicago Cubs from 1989 to 2001.
Document 3: 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 4: 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.
Document 5: Brooks Kieschnick: Michael Brooks Kieschnick (born June 6, 1972) is a former American baseball utility player and pitcher. The only player to win the Dick Howser Trophy twice, he is a College Hall of Fame inductee and he later played six Major League Baseball (MLB) seasons. He played the majority of his career for the Chicago Cubs and the Milwaukee Brewers, and also played for the Cincinnati Reds and Colorado Rockies from 1996 to 2004. He batted left-handed but threw right-handed. During the initial part of his major league career, he was exclusively a position player, playing the outfield; for his final two seasons in the big leagues, he served primarily as a relief pitcher who also occasionally doubled as an outfielder and pinch hitter.
Document 6: Jamie Moyer: Jamie Moyer (born November 18, 1962) is an American former professional baseball pitcher. Over his 25-year career in Major League Baseball (MLB), Moyer pitched for the Chicago Cubs, Texas Rangers, St. Louis Cardinals, Baltimore Orioles, Boston Red Sox, Seattle Mariners, Philadelphia Phillies, and Colorado Rockies. He was inducted into the Mariners Hall of Fame in 2015.
Document 7: 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 8: Fort Dodge, Iowa: Fort Dodge is a city in and the county seat of Webster County, Iowa, United States, along the Des Moines River. The population was 25,206 in the 2010 census, an increase from 25,136 in the 2000 census. Fort Dodge is a major commercial center for North Central and Northwest Iowa. It is located on U.S. Routes 20 and 169.
Document 9: 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 10: Steve Kent (baseball): Steven Patrick Kent (born October 3, 1978 in Frankfurt, West Germany) is a former Major League Baseball pitcher. Kent played for the Tampa Bay Devil Rays during the 2002 season. In 34 games in relief in his one-season career, Kent had a 0-2 record with a 5.65 ERA. He allowed 41 hits and 6 runs. From 2003 - 2007 Kent spent time with the Florida Marlins, Colorado Rockies, Atlanta Braves and Houston Astros. In , Kent pitched for three different teams in the Atlantic League of Professional Baseball. He currently plays for the Kansas City T-Bones of the American Association of Independent Professional Baseball.
Document 11: Aroldis Chapman: Albertín Aroldis Chapman de la Cruz (Spanish: (aˈɾoldis ˈtʃapman); born February 28, 1988) is a Cuban - American professional baseball pitcher for the New York Yankees of Major League Baseball (MLB). He previously played in MLB for the Cincinnati Reds and Chicago Cubs and in the Cuban National Series for Holguín. Chapman bats and throws left - handed, and is nicknamed the Cuban Missile or the Cuban Flame Thrower
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: 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 14: Kevin Little: Kevin Little (born April 3, 1968, in Des Moines, Iowa) is a former American athlete, who specialized in sprints. He won the 200 meter race in the 1997 IAAF World Indoor Championships in Paris, France. He won bronze in the same event in the 1989, 1993, and 1999 IAAF World Indoor Championships.
Document 15: 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.
ground_truth: Warren County
sub_queries: Kevin Tapani >> place of birth Answer: Des Moines
Des Moines >> located in the administrative territorial entity Answer: Warren County