Please answer the following question: Information: - John D. Bessler is a professor of law at the University of Baltimore School of Law and an adjunct professor at the Georgetown University Law Center . He is the spouse of U.S. Senator Amy Klobuchar . - The University System of Maryland (USM) is a public corporation and charter school system comprising 12 Maryland institutions of higher education. It is the 12th-largest university system in the United States, with over 125,000 undergraduate, 43,000 graduate and roughly 13,000 combined full-time and part-time faculty. - Minnesota (locally ) is a state in the midwestern and northern regions of the United States. Minnesota was admitted as the 32nd U.S. state on May 11, 1858, created from the eastern half of the Minnesota Territory. The state has a large number of lakes, and is known by the slogan "Land of 10,000 Lakes". Its official motto is "L'Etoile du Nord" (French: "Star of the North"). Minnesota is the 12th largest in area and the 21st most populous of the U.S. states; nearly 60 percent of its residents live in the MinneapolisSaint Paul metropolitan area (known as the "Twin Cities"), the center of transportation, business, industry, education, and government and home to an internationally known arts community. The remainder of the state consists of western prairies now given over to intensive agriculture; deciduous forests in the southeast, now partially cleared, farmed and settled; and the less populated North Woods, used for mining, forestry, and recreation. Minnesota is known for its progressive political orientation and its high rate of civic participation and voter turnout. Until European settlement, Minnesota was inhabited by the Dakota and Ojibwe/Anishinaabe. During the 19th and early 20th centuries, the large majority of the European settlers emigrated from Scandinavia and Germany, and the state remains a center of Scandinavian American and German American culture. In recent decades, immigration from Asia, the Horn of Africa, and Latin America has broadened its historic demographic and cultural composition. Minnesota's standard of living index is among the highest in the United States, and the state is also among the best-educated and wealthiest in the nation. - The University of Baltimore (UB), located in midtown Baltimore, Maryland, in the Mt. Vernon neighborhood at 1420 N. Charles Street, is part of the University System of Maryland. The university is a public undergraduate, graduate, and professional university located in the heart of the state's largest city. UB's schools and colleges provide education in business, law, public affairs, and the applied arts and sciences. - The University of Baltimore School of Law, or UB Law, is one of the four colleges that make up the University of Baltimore, which is part of the University System of Maryland. UB Law is one of only two law schools in the state of Maryland, with the University of Maryland Francis King Carey School of Law; both are located in downtown Baltimore. The University of Baltimore School of Law is housed in the new John and Frances Angelos Law Center, at the corner of Mount Royal Ave. and N. Charles St. on the University of Baltimore's main campus in the Mt. Vernon cultural district. The twelve-story building designed by Stefan Behnisch opened in April 2013. - Amy Jean Klobuchar (born May 25, 1960) is the senior United States Senator from Minnesota. She is a member of the Minnesota Democratic-Farmer-Labor Party, an affiliate of the Democratic Party. She is the first woman to be elected as a senator for Minnesota and is one of twenty women serving in the current United States Senate. Given the information above, choose from the list below the object entity that exhibits the relation 'date of birth' with the subject 'john bessler'. Choices: - 11 - 12 - 125 - 1420 - 1858 - 1960 - 2013 - 25 - 60
A:
1960