Question: Leonard Nathan's birthplace is in what county?

full_context: Document 1: Chinquapin Airport: Chinquapin Airport was closed, the property sold in 1948 and the land was redeveloped into a housing development. The hangars at the airport were moved to the new airport. The runways were subsequently converted into streets. One runway is now Marietta Drive, and the other is Westgate Drive, with houses built along each side of the streets.
Document 2: Leemon McHenry: Leemon McHenry is a bioethicist and a lecturer in philosophy at California State University, Northridge, in the United States. He has taught philosophy at the University of Edinburgh, Old Dominion University, Davidson College, Central Michigan University, Wittenberg University and Loyola Marymount University, and has held visiting research positions at Johns Hopkins University, UCLA and at the Institute for Advanced Studies in the Humanities in the University of Edinburgh. His research interests center on medical ethics, metaphysics, and philosophy of science.
Document 3: Nathan Pacheco: After spending his youth in Northern Virginia and graduating from Oakton High School, Pacheco graduated from the music program of Brigham Young University, and also followed his love of culture and languages by continuing his education abroad in South America and Europe. Pacheco spent over two years in Brazil, being immersed in its culture and allowing its influence to contribute to his musical development. He eventually traveled throughout Brazil, performing both classical as well as some of Brazil's cultural music.
Document 4: San Gabriel Valley Airport: San Gabriel Valley Airport (formerly El Monte Airport) is a public airport one mile (1.6 km) north of El Monte, in Los Angeles County, California. The airport covers and has one runway. In November 2014, the airport's name was officially changed from El Monte Airport to San Gabriel Valley Airport.
Document 5: Southern California: Southern California is home to Los Angeles International Airport, the second-busiest airport in the United States by passenger volume (see World's busiest airports by passenger traffic) and the third by international passenger volume (see Busiest airports in the United States by international passenger traffic); San Diego International Airport the busiest single runway airport in the world; Van Nuys Airport, the world's busiest general aviation airport; major commercial airports at Orange County, Bakersfield, Ontario, Burbank and Long Beach; and numerous smaller commercial and general aviation airports.
Document 6: Mendy Samstein: Born in Manhattan, he majored in European history at Brandeis, and later earned a master's degree in the same subject from Cornell. He was studying for a Ph.D. in history at the University of Chicago when he quit to join the civil rights movement in the South. He became a full-time organizer for the Student Nonviolent Coordinating Committee (or SNCC, pronounced "snick"). Stokely Carmichael, later chairman of SNCC, called Samstein "one in a million".
Document 7: Calaveras County Airport: Calaveras County Airport , also known as Maury Rasmussen Field, is a public airport located four miles (6 km) southeast of the central business district of San Andreas, in Calaveras County, California, United States. It is owned by the County of Calaveras.
Document 8: Robert A. Leonard: Robert A. Leonard is an American linguist. He is best known for his work in forensic linguistics, which relates to investigating problems of the law by using the study of language. This includes analyzing legal material work such as notes, audio and video tape recordings, contracts, and confessions. Prior to his academic career, Leonard was a founding member of the rock band Sha Na Na and performed at Woodstock.
Document 9: Raymond O. Faulkner: In 1951 Faulkner became an assistant in language teaching at University College London, progressing to become a lecturer in Egyptian language – a post he held from 1954 to 1967. He received his Doctor of Letters degree from the University of London in 1960.
Document 10: Hannington Sengendo: Sengendo also holds a Bachelor of Arts (BA), degree from Makerere University and the degree of Master of Arts in Human Geography (MA), obtained in 1987, from the University of Leeds. His degree of Doctorate in Urban Planning (PhD), was obtained in 1992, from the University of Nottingham.
Document 11: Santa Barbara Municipal Airport: It is near the University of California, Santa Barbara and the city of Goleta. The airport was annexed to the city of Santa Barbara by a long, wide corridor, mostly under the Pacific Ocean (a shoestring annexation). Most of the airport is 10 to 15 feet above sea level and borders a wetland area, the Goleta Slough.
Document 12: Noriaki Kano: Noriaki Kano completed his undergraduate, masters, and doctoral degrees in the engineering school of the University of Tokyo. He retired from the Tokyo University of Science (TUS) after 35 years in research and education, as a lecturer and associate professor at the University of Electro-Communications and a full professor and head of the Department of Management Science at TUS.
Document 13: San Gabriel, Texas: San Gabriel, Texas is a town located in northwest Milam County, Texas approximately 10 miles north of Thorndale on Ranch Road 486, or about 50 miles northeast of the Austin metropolitan area. San Gabriel's latitude is 30.694 North by longitude -97.196 West and has an elevation of 417 feet above sea level. San Gabriel appears on the San Gabriel U.S. Geological Survey Map and is in the Central Time Zone (UTC/GMT -6 hours - UTC/GMT -5 hours during Daylight Saving Time).
Document 14: Leonard Nathan: Born in El Monte, California, Nathan earned a bachelor's degree in English at UC Berkeley in 1950, a master's degree in English in 1952 and a Ph.D. in 1961. He was then hired as a lecturer in UC Berkeley's Department of Speech, and was promoted to associate professor in 1965 and to professor in 1968.
Document 15: Airport, California: Airport is a census-designated place (CDP) in Stanislaus County, California. Airport sits at an elevation of . The 2010 United States census reported Airport's population was 1,964.
ground_truth: Los Angeles County
sub_queries: Leonard Nathan >> place of birth Answer: El Monte
El Monte >> located in the administrative territorial entity Answer: Los Angeles County