Question: How many miles northwest of the place where Fred Iltis died is it located?

full_context: Document 1: Insect: The higher-level phylogeny of the arthropods continues to be a matter of debate and research. In 2008, researchers at Tufts University uncovered what they believe is the world's oldest known full-body impression of a primitive flying insect, a 300 million-year-old specimen from the Carboniferous period. The oldest definitive insect fossil is the Devonian Rhyniognatha hirsti, from the 396-million-year-old Rhynie chert. It may have superficially resembled a modern-day silverfish insect. This species already possessed dicondylic mandibles (two articulations in the mandible), a feature associated with winged insects, suggesting that wings may already have evolved at this time. Thus, the first insects probably appeared earlier, in the Silurian period.
Document 2: Stanford University: Most of Stanford University is on an 8,180-acre (12.8 sq mi; 33.1 km2) campus, one of the largest in the United States. It is located on the San Francisco Peninsula, in the northwest part of the Santa Clara Valley (Silicon Valley) approximately 37 miles (60 km) southeast of San Francisco and approximately 20 miles (30 km) northwest of San Jose. In 2008, 60% of this land remained undeveloped.Stanford's main campus includes a census-designated place within unincorporated Santa Clara County, although some of the university land (such as the Stanford Shopping Center and the Stanford Research Park) is within the city limits of Palo Alto. The campus also includes much land in unincorporated San Mateo County (including the SLAC National Accelerator Laboratory and the Jasper Ridge Biological Preserve), as well as in the city limits of Menlo Park (Stanford Hills neighborhood), Woodside, and Portola Valley.
Document 3: Edward M. Barrows: Edward M. Barrows (born August 8, 1946, in Detroit, Michigan) is a biologist who earned his BS in Botany and Zoology at the University of Michigan, Ann Arbor, in 1968, and his PhD in entomology, mentored by Charles Duncan Michener, at the University of Kansas, Lawrence in 1975. Further, he is a retired U.S. Army officer. He has had a lifetime interest in nature, science, and art. He performed research on bee nesting, predation, and reproductive behavior, for example, finding that female "Lasioglossum zephyrum" sweat bees have individual odors perceived by conspecific males. This was evidently the first discovery of invertebrate individual odors, as opposed to group or nest odors. He later found that males of the "Xylocopa virginica virginica" (large carpenter bee) have highly complex mate searching and mate-acquisition behaviors, perhaps more complicated that any other bee species and many other animal species. Students and he studied feeding behavior and recovery from injuries in "Mimus polyglottos" (northern mockingbirds). With students and established scientists, he studied or is studying arthropod community structure in a rare, freshwater, tidal, marsh, and associated habitats, evolution of floral display in "Asclepias syriaca" (common milkweed), parasitization and reproductive behavior of chalcidoid wasps, floral associates of rare plants, and other topics. His research in scientific communication led to the book "Animal Desk Reference, A Dictionary of Animal Behavior, Ecology, and Evolution" (3rd edition). His current research laboratory, the Laboratory of Entomology and Biodiversity, is in the Heyden Observatory of Georgetown University.
Document 4: Torkel Weis-Fogh: Torkel Weis-Fogh (25 March 1922 – 13 November 1975) was a Danish zoologist and Professor at the University of Cambridge and the University of Copenhagen. He is best known for his contributions to the understanding of insect flight, especially the clap and fling mechanism used by very small insects. James Lighthill named this "the Weis-Fogh mechanism of lift generation".
Document 5: Frederick Wallace Edwards: Frederick Wallace Edwards FRS (28 November 1888 in Fletton, Peterborough – 15 November 1940 in London), was an English entomologist who specialised in Diptera.
Document 6: Fred Adams: Fred Adams is the Ta-You Wu Collegiate Professor of Physics at the University of Michigan, where his main field of research is astrophysics theory focusing on star formation, planet formation, and dynamics. His seminal work on the radiative signature of star formation has provided a foundation for further studies in star formation. In more recent years, he has studied the formation and evolution of planetary systems, including the effect of the stellar birth cluster environment.
Document 7: San Francisco: San Francisco (initials SF) (/ ˌsæn frənˈsɪskoʊ /, Spanish for Saint Francis; Spanish: (san franˈsisko)), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. The consolidated city - county covers an area of about 47.9 square miles (124 km), mostly at the north end of the San Francisco Peninsula in the San Francisco Bay Area. It is the fourth-most populous city in California, and the 13th-most populous in the United States, with a 2016 census - estimated population of 870,887. The population is projected to reach 1 million by 2033. As of 2016, San Francisco County was the 7th highest - income county in the United States, with a per capita personal income of $110,418.
Document 8: Fred Iltis: Fred Iltis (Brno, Czechoslovakia, April 20, 1923 – San Jose, California, December 11, 2008) was an American entomologist. His research focused on the biosystematics and life cycle of mosquitoes.
Document 9: Frederick Iseman: His philanthropic interests include medical research at Columbia-Presbyterian Medical Center, the Frederick Iseman Theater at Yale University, the Wharton Institute, the Taub Institute for Brain Research, oncology, immunology, and other disciplines. As a member of the Board of Directors of The Metropolitan Opera, Iseman underwrote the production of Dimitri Shostakovich's The Nose for the 2009-2010 season. He is also on the Board of Trustees of Carnegie Hall and is Chairman of the Mariinsky Foundation of America. Iseman is also a Harold Pratt Fellow of the Council on Foreign Relations and served on that Council’s Independent Task Force on U.S. Nuclear Weapons Policy. He was the lead sponsor of the Yale Center for the Study of Globalization's 2008 conference on nuclear weapons. Iseman is a major supporter of Stanford University's Preventive Defense Project, a part of the Center for International Security and Cooperation at the Freeman Spogli Institute and the Yale Center for Genocide Studies. His support of the latter allowed Adam Jones to complete his book, Genocide: A Comprehensive Introduction.
Document 10: San Francisco Bay Area: Home to approximately 7.68 million people, Northern California's nine - county Bay Area contains many cities, towns, airports, and associated regional, state, and national parks, connected by a complex multimodal transportation network. The larger combined statistical area of the region, which includes twelve counties, is the second - largest in California (after the Greater Los Angeles area), the fifth - largest in the United States, and the 41st - largest urban area in the world with 8.75 million people. The Bay Area's population is ethnically diverse: for example, roughly half of the region's residents are Hispanic, Asian, African American, or Pacific Islander, all of whom have a significant presence throughout the region.
Document 11: Stanford University: Jasper Ridge Biological Preserve is a 1,200-acre (490 ha) natural reserve south of the central campus owned by the university and used by wildlife biologists for research.
Document 12: San Jose, California: The cost of living in San Jose and the surrounding areas is among the highest in California and the nation, according to 2004 data. Housing costs are the primary reason for the high cost of living, although the costs in all areas tracked by the ACCRA Cost of Living Index are above the national average. Households in the city limits have the highest disposable income of any city in the U.S. with over 500,000 residents.San Jose holds the distinction of being a United States Foreign-Trade Zone. The City received its Foreign Trade Zone grant from the U.S. Federal Government in 1974, making it the 18th foreign-trade zone established in the United States. Under its grant, the City of San Jose is granted jurisdiction to oversee and administer foreign trade in Santa Clara County, Monterey County, San Benito County, Santa Cruz County, and in the southern parts of San Mateo County and Alameda County.San Jose lists many companies with 1,000 employees or more, including the headquarters of Adobe, Altera, Brocade Communications Systems, Cadence Design Systems, Cisco Systems, eBay, Lee's Sandwiches, Lumileds, PayPal, Rosendin Electric, Sanmina-SCI, and Xilinx, as well as major facilities for Becton Dickinson, Ericsson, Hewlett-Packard, Hitachi, IBM, Kaiser Permanente, KLA Tencor, Lockheed Martin, Nippon Sheet Glass, Qualcomm, and AF Media Group. The North American headquarters of Samsung Semiconductor are located in San Jose. Approximately 2000 employees will work at the new Samsung campus which opened in 2015.
Document 13: San Francisco: San Francisco is located on the West Coast of the United States at the north end of the San Francisco Peninsula and includes significant stretches of the Pacific Ocean and San Francisco Bay within its boundaries. Several picturesque islands—Alcatraz, Treasure Island and the adjacent Yerba Buena Island, and small portions of Alameda Island, Red Rock Island, and Angel Island—are part of the city. Also included are the uninhabited Farallon Islands, offshore in the Pacific Ocean. The mainland within the city limits roughly forms a "seven-by-seven-mile square", a common local colloquialism referring to the city's shape, though its total area, including water, is nearly .
Document 14: San Jose, California: San Jose is home to several colleges and universities. The largest is San Jose State University, which was founded by the California legislature in 1862 as the California State Normal School, and is the founding campus of the California State University (CSU) system. Located in downtown San Jose since 1870, the university enrolls approximately 30,000 students in over 130 different bachelor's and master's degree programs. The school enjoys a good academic reputation, especially in the fields of engineering, business, art and design, and journalism, and consistently ranks among the top public universities in the western region of the United States. San Jose State is one of only three Bay Area schools that fields a Football Bowl Subdivision (FBS) Division I college football team; Stanford University and U.C. Berkeley are the other two.
Document 15: Miguel Itzigsohn: Itzigsohn was a professor of spherical and practical astronomy. From 1955 to 1972, he was director of the extrameridian astronomy department at the La Plata Astronomical Observatory, specializing in astrometry and celestial mechanics. He was responsible for the surge in observational and computational activity in studies of minor planets in Argentina following World War II.
ground_truth: 20 miles
sub_queries: In what place did Fred Iltis die? Answer: San Jose
How many miles northwest of San Jose is it located? Answer: 20 miles