paragraph_text: Wittmann is a census-designated place in Maricopa County, Arizona, United States. It is located along U.S. Route 60 in the central part of Arizona, about 35 miles northwest of central Phoenix, and while technically located within the city's metropolitan area it is generally regarded by locals to be just outside it. As of the 2010 census, there were 6700 people living in the Wittmann ZIP Code Tabulation Area (85361), but 763 in Wittmann itself.

paragraph_text: Its position as located in a 1918 survey is located at 39 ° 50 ′ N 98 ° 35 ′ W ﻿ / ﻿ 39.833 ° N 98.583 ° W ﻿ / 39.833; - 98.583 ﻿ (Geographic Center of the Contiguous United States), in Kansas about 2.6 miles (4.2 km) northwest of the center of Lebanon, approximately 12 miles (19 km) south of the Kansas - Nebraska border.

paragraph_text: 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.

paragraph_text: Marquette is an unincorporated community in the Rural Municipality of Woodlands in the Interlake Region of Manitoba, Canada. It is located approximately 46 kilometers (29 miles) northwest of Winnipeg.

paragraph_text: Hockley is an unincorporated community located in Harris County, Texas on Texas State Highway 6 and U.S. Highway 290, approximately five miles southeast of the city hall of Waller, and thirty - six miles northwest of Downtown Houston.

paragraph_text: Kamela is an unincorporated community in Union County, Oregon, United States. It is located west of Interstate 84 about 20 miles northwest of La Grande.

paragraph_text: Fred Meyer Jewelers started in 1973 as a catalog showroom concept by Fred G. Meyer. As the catalog showroom fad started to die down, Fred Meyer was experiencing excellent sales growth in the fine jewelry category. To capitalize on this sales growth, Fred Meyer placed fine jewelry stores in their large multi-department stores and eventually shopping malls throughout the Western United States.

paragraph_text: Mount Carmel is a borough in Northumberland County, Pennsylvania, United States. The population was 5,869 at the 2010 census. It is located 88 miles (141 km) northwest of Philadelphia and 71 miles (114 km) northeast of Harrisburg, in the Anthracite Coal Region. It is completely encompassed by Mount Carmel Township.

paragraph_text: Sowers is a ghost town located approximately 11 miles northwest of Dallas, Texas in Dallas County. Today, the once rural community is located entirely within the boundaries of Irving, Texas. Of the original townsite, only the cemetery remains.

paragraph_text: Storck Barracks/Illesheim Kaserne is a United States Army facility adjacent to Illesheim, Germany, located about 15 miles northwest of Ansbach (Bavaria), about 240 miles south-southwest of Berlin.

paragraph_text: Woodlands is an unincorporated community in the Rural Municipality of Woodlands in the Interlake Region of Manitoba, Canada. It is located approximately 51 kilometers (32 miles) northwest of Winnipeg.

paragraph_text: Prieta Mesa is a large mesa located northwest of Albuquerque in Sandoval County, New Mexico. It is approximately 12 miles or 19.4 km long (north to south).

paragraph_text: Its position as located in a 1918 survey is located at 39 ° 50 ′ N 98 ° 35 ′ W ﻿ / ﻿ 39.833 ° N 98.583 ° W ﻿ / 39.833; - 98.583 ﻿ (Geographic Center of the Contiguous United States), about 2.6 miles (4.2 km) northwest of the center of Lebanon, Kansas, approximately 12 miles (19 km) south of the Kansas - Nebraska border.

paragraph_text: Devil's Courthouse is a mountain in the Appalachian Mountains of western North Carolina in the United States of America. The mountain is located at the Western edge of the Pisgah National Forest about 10 miles (16 kilometers) northwest of Brevard and 28 miles (45 kilometers) southwest of Asheville. Located at milepost 422.4 (kilometer 679.8 km) of the Blue Ridge Parkway, the Devil's Courthouse has a moderate/strenuous trail climbing a half mile to its peak where panoramic views can be seen.

paragraph_text: Moshannon is an unincorporated community and census-designated place (CDP) in Snow Shoe Township, Centre County, Pennsylvania, United States. As of the 2010 census, the population was 281 residents. It is located northwest of Interstate 80 at the convergence of Pennsylvania Routes 53 and 144. Black Moshannon Creek, part of the West Branch Susquehanna River watershed, runs through a valley half a mile (0.8 km) south of the town.

paragraph_text: 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.

paragraph_text: Austin, the southernmost state capital of the contiguous 48 states, is located in Central Texas. Austin is 160 miles (260 km) northwest of Houston, 195 miles (310 km) south of Dallas and 80 miles (130 km) northeast of San Antonio.

paragraph_text: Eschwege Airfield is a former military airfield located in Germany in the northwest part of Eschwege (Hessen); approximately 170 miles southwest of Berlin.

paragraph_text: Owensville is a former community in Robertson County, Texas, United States. Owensville was located on Farm to Market Road 46 five miles northwest of Franklin.

paragraph_text: High Hill is an unincorporated community in southwestern Fayette County, Texas, United States. It is located on Farm Road 2672, three miles northwest of Schulenburg, Texas.

Question: How many miles northwest of the place where Fred Iltis died is it located?
Answer: 20 miles