Question: In which county was Marcos Ramirez born?

full_context: Document 1: Márcio Wenceslau: At the 2008 Summer Olympics, Wenceslau defeated Iran's Reza Naderian by hitting a frontal blow in the first preliminary round match, with a score of 2–1. He reached the quarterfinal round, before losing to world champion Juan Antonio Ramos of Spain, by a defensive kick in the first two periods, with a decisive score of 2–3.
Document 2: Rafael Ramos (boxer): Rafael "Fito" Ramos (born January 1, 1965) is a retired boxer from Puerto Rico. He competed in the 1984 Summer Olympics and twice won a medal (gold and bronze) at the Pan American Games during his career.
Document 3: 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 4: 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 5: Floyd Mayweather Jr. vs. Robert Guerrero: Weight Class Result Round Time Notes Welterweight Floyd Mayweather Jr. def. Robert Guerrero Unanimous Decision 12 3: 00 Championship bout. Featherweight Abner Mares def. Daniel Ponce De Leon TKO 9 2: 20 Championship bout. Super Bantamweight Léo Santa Cruz def. Alexander Muñoz TKO 5 1: 05 Middleweight J'Leon Love vs. Gabriel Rosado No Contest 10 3: 00 Super Middleweight Ronald Gavril def. Roberto Yong TKO 2: 12 Super Middleweight Lanell Bellows def. Matt Garretson TKO 0: 32 Super Middleweight Luis Arias def. DonYil Livingston Majority Decision 6 3: 00 Light Heavyweight Badou Jack def. Michael Gbenga TKO 2: 26
Document 6: 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 7: 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 8: Óscar Valdez: Óscar Rafael Valdez Fierro (born December 22, 1990 in Nogales, Sonora) is a Mexican professional boxer who has held the WBO featherweight title since 2016. Valdez qualified for the 2008 Olympics at the age of 17 and became the first Mexican Youth World Champion. Four years later he qualified for the 2012 Summer Olympics. Valdez is known for his aggressive fighting style, punching power and terrific combination punching. He currently boasts a 79% knockout ratio.
Document 9: Marcos Ramirez (boxer): Marcos Ramírez (born March 31, 1981 in Des Moines, Iowa) is a professional boxer fighting in the Featherweight division. Ramírez is a former WBO NABO and the IBF Latino Featherweight Champion.
Document 10: 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 11: 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 12: 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 13: Morris East: Morris East (born August 8, 1973 in Olongapo, Philippines) is a retired Filipino professional boxer and boxing trainer. East is the former GAB Light Middleweight, OPBF and WBA World Light Welterweight champion. Morris has trained world champions Zab Judah and Nonito Donaire.
Document 14: Ana María Torres: Ana María Torres Ramírez, also known as La Guerrera (born on 25 January 1980 in Nezahualcóyotl, State of Mexico) is a Mexican female boxer who held the WBC Super flyweight title from 7 October 2006 to 19 October 2007 and from 30 August 2008 to 17 May 2012.
Document 15: 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.
ground_truth: Warren County
sub_queries: Marcos Ramirez >> place of birth Answer: Des Moines
Des Moines >> located in the administrative territorial entity Answer: Warren County