Question: Information:  - The University of California (UC) is a public university system in the U.S. state of California. Under the California Master Plan for Higher Education, the University of California is a part of the state's three-system public higher education plan, which also include the California State University system and the California Community Colleges System.  - Barack Hussein Obama II (; born August 4, 1961) is an American politician who served as the 44th President of the United States from 2009 to 2017. He was the first African American to serve as president, as well as the first born outside the contiguous United States. He previously served in the U.S. Senate representing Illinois from 2005 to 2008, and in the Illinois State Senate from 1997 to 2004.  - A recess appointment is the appointment, by the President of the United States, of a senior federal official while the U.S. Senate is in recess. The United States Constitution requires that the most senior federal officers must be confirmed by the Senate before assuming office, but while the Senate is in recess the President may act alone by making a recess appointment to fill "Vacancies that may happen during the Recess of the Senate." To remain in effect, a recess appointment must be approved by the Senate by the end of the next session of Congress, or the position becomes vacant again; in current practice this means that a recess appointment must be approved by roughly the end of the next calendar year. Recess appointments are authorized by , which states:  - Arizona (O'odham: "Al onak" [ai onak]) is a state in the southwestern region of the United States. It is also part of the Western United States and the Mountain West states. It is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is one of the Four Corners states. It has borders with New Mexico, Utah, Nevada, California, and Mexico, and one point in common with the southwestern corner of Colorado. Arizona's border with Mexico is 389 miles (626 km) long, on the northern border of the Mexican states of Sonora and Baja California.  - Janet Ann Napolitano (born November 29, 1957) is an American politician, lawyer, and university administrator who served as the 21st Governor of Arizona from 2003 to 2009 and United States Secretary of Homeland Security from 2009 to 2013, under President Barack Obama. She has been president of the University of California system since September 2013, shortly after she resigned as Secretary of Homeland Security.  - The United States Constitution is the supreme law of the United States of America. The Constitution, originally comprising seven articles, delineates the national frame of government. Its first three articles entrench the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral Congress; the executive, consisting of the President; and the judicial, consisting of the Supreme Court and other federal courts. Articles Four, Five and Six entrench concepts of federalism, describing the rights and responsibilities of state governments and of the states in relationship to the federal government. Article Seven establishes the procedure subsequently used by the thirteen States to ratify it.  - Alan D. Bersin ( born October 15 , 1946 ) served as the acting Commissioner of U.S. Customs and Border Protection ( CBP ) . Acting Commissioner Bersin was placed by President Barack Obama on March 27 , 2010 as a recess appointment . As Acting Commissioner , Mr. Bersin oversaw the operations of CBP 's 57,000 - employee work force and managed an operating budget of more than $ 11 billion . Bersin formerly served as the Department of Homeland Security Assistant Secretary for International Affairs and Special Representative for Border Affairs , informally known as the `` Border Czar . '' Bersin currently serves as Assistant Secretary of International Affairs and Chief Diplomatic Officer for the Department of Homeland Security , a position he assumed on January 3 , 2012 . According to the Department of Homeland Security website , in this position Bersin `` oversees the Department 's international engagement and serves as the principal advisor to Secretary Janet Napolitano on all international affairs '' . Bersin is a former Secretary of Education for California , as well as a former superintendent of San Diego City Schools , past federal Assistant United States Attorney ( AUSA ) and United States Attorney for the United States District Court for the Southern District of California , and former Attorney General 's Southwest Border Representative . He previously served as the chair of the executive committee of the San Diego County Regional Airport Authority .  - The President of the United States (POTUS) is the elected head of state and head of government of the United States. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.  - The United States Secretary of Homeland Security is the head of the United States Department of Homeland Security, the body concerned with protecting the U.S. and the safety of U.S. citizens. The secretary is a member of the President's Cabinet. The position was created by the Homeland Security Act following the attacks of September 11, 2001. The new department consisted primarily of components transferred from other cabinet departments because of their role in homeland security, such as the Coast Guard, the Federal Protective Service, U.S. Customs and Border Protection (which includes the Border Patrol), U.S. Immigration and Customs Enforcement (which includes Homeland Security Investigations), the Secret Service, and the Federal Emergency Management Agency (FEMA). It did not, however, include the FBI or the CIA.  - U.S. Customs and Border Protection (CBP) is the largest federal law enforcement agency of the United States Department of Homeland Security. It is charged with regulating and facilitating international trade, collecting import duties, and enforcing U.S. regulations, including trade, customs, and immigration. CBP is the largest law enforcement agency in the United States. It has a workforce of more than 45,600 sworn federal agents and officers. It has its headquarters in Washington, D.C.  - Illinois is a state in the midwestern region of the United States, achieving statehood in 1818. It is the 5th most populous state and 25th largest state in terms of land area, and is often noted as a microcosm of the entire country. The word "Illinois" comes from the Algonquin word for "tribe of superior men". With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a diverse economic base and is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean, as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O'Hare International Airport has been ranked as one of the world's busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics.    Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'alan bersin'.  Choices: - administrator  - head of state  - law enforcement  - lawyer  - major  - master  - member  - mountain  - official  - politician  - president  - secretary  - united states of america
Answer:
lawyer