Question: Who is chief of state of the country that shares a border with the state where Finding Dory takes place?

full_context: Document 1: Finding Dory: One year later, Dory is living with Marlin and Nemo on their reef. One day, Dory has a flashback and remembers that she has parents. She decides to look for them, but her memory problem is an obstacle. She eventually remembers that they lived at the Jewel of Morro Bay across the ocean in California, thanks to Nemo mentioning its name.
Document 2: Enrique Peña Nieto: Enrique Peña Nieto (Spanish pronunciation: (enˈrike ˈpeɲa ˈnjeto) (listen); born 20 July 1966), commonly referred to by his initials EPN, is a Mexican politician serving as the 57th President of Mexico, since 2012. He previously served in the State of Mexico as Secretary of Administration (2000 -- 2002), Representative (2003 -- 2004), and Governor (2005 -- 2011).
Document 3: San Diego: The city shares a 15-mile (24 km) border with Mexico that includes two border crossings. San Diego hosts the busiest international border crossing in the world, in the San Ysidro neighborhood at the San Ysidro Port of Entry. A second, primarily commercial border crossing operates in the Otay Mesa area; it is the largest commercial crossing on the California-Baja California border and handles the third-highest volume of trucks and dollar value of trade among all United States-Mexico land crossings.
Document 4: Mexico–United States border: The total length of the continental border is 1,954 miles (3,145 km). From the Gulf of Mexico, it follows the course of the Rio Grande (Río Bravo del Norte) to the border crossing at Ciudad Juárez, Chihuahua, and El Paso, Texas. Westward from El Paso -- Juárez, it crosses vast tracts of the Chihuahuan and Sonoran deserts to the Colorado River Delta and San Diego -- Tijuana, before reaching the Pacific Ocean.
Document 5: Finding Dory: Ellen DeGeneres as Dory, a regal blue tang who suffers from short - term memory loss. Sloane Murray as Young Dory. Murray is the seven - year - old daughter of producer Lindsey Collins. Lucia Geddes as Teen Dory.
Document 6: President of Mexico: The President of the United Mexican States (Spanish: Presidente de los Estados Unidos Mexicanos), commonly shortened to President of Mexico, is the head of state and government of Mexico. Under the Constitution, the president is also the Supreme Commander of the Mexican armed forces. The current President is Enrique Peña Nieto, who took office on December 1, 2012.
Document 7: Mexico–United States border: The total length of the continental border is 3,201 kilometers (1,989 mi). From the Gulf of Mexico, it follows the course of the Rio Grande (Río Bravo del Norte) to the border crossing at Ciudad Juárez, Chihuahua and El Paso, Texas. Westward from El Paso -- Juárez, it crosses vast tracts of the Chihuahuan and Sonoran deserts to the Colorado River Delta and San Diego -- Tijuana, before reaching the Pacific Ocean.
Document 8: Texas: Texas (/ ˈtɛksəs /, locally / ˈtɛksəz /; Spanish: Texas or Tejas, pronounced (ˈtexas)) is the second largest state in the United States by both area and population. Geographically located in the South Central region of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast.
Document 9: President of Mexico: Not be a secretary of state or under-secretary of state, attorney general, governor of a State, or head of the government of Mexico City, unless "separated from the post" (resigned or been granted permanent leave of absence) at least six months prior to the election.
Document 10: Finding Dory: Marlin and Nemo attempt to rescue Dory. With the help of two California sea lions named Fluke and Rudder and a disfigured common loon named Becky, they manage to get into the institute and find her in the pipe system. Other blue tangs tell them that Dory's parents escaped from the institute a long time ago to search for her and never came back, leaving Dory believing that they have died. Hank retrieves Dory from the tank, accidentally leaving Marlin and Nemo behind. He is then apprehended by one of the employees and unintentionally drops Dory into the drain, flushing her out to the ocean. While wandering aimlessly, she comes across a trail of shells; remembering that when she was young, her parents had set out a similar trail to help her find her way back home, she follows it. At the end of the trail, Dory finds an empty brain coral with multiple shell trails leading to it. As she turns to leave, she sees her parents Jenny and Charlie in the distance. They tell her they spent years laying down the trails for her to follow in the hopes that she would eventually find them.
Document 11: Finding Nemo: Finding Nemo is a 2003 American computer - animated family film family comedy produced by Pixar Animation Studios and released by Walt Disney Pictures. Written and directed by Andrew Stanton with co-direction by Lee Unkrich, the film stars the voices of Albert Brooks, Ellen DeGeneres, Alexander Gould, and Willem Dafoe. It tells the story of the overprotective ocellaris clownfish named Marlin who, along with a regal blue tang named Dory, searches for his abducted son Nemo all the way to Sydney Harbour. Along the way, Marlin learns to take risks and comes to terms with Nemo taking care of himself.
Document 12: President of Mexico: President of the United Mexican States Seal of the Federal Government of Mexico Mexican Presidential Standard Incumbent Enrique Peña Nieto since December 1, 2012 (2012 - 12 - 01) Executive branch of the Mexican Government Office of the President of Mexico Residence Los Pinos Seat Mexico City Appointer Federal Electoral Tribunal Term length Six years (sexenio) Single term Constituting instrument Constitution of Mexico Inaugural holder Guadalupe Victoria Formation October 10, 1824 Salary MXN $208,570.92 per month, before taxes. Website en.presidencia.gob.mx
Document 13: Mexico–United States border: Among the U.S. states, Texas has the longest stretch of the border with Mexico, while California has the shortest. Among the states in Mexico, Chihuahua has the longest border with the United States, while Nuevo León has the shortest.
Document 14: Finding Dory: Ellen DeGeneres as Dory, a regal blue tang, who suffers from short - term memory loss. Sloane Murray as young Dory. Murray is the seven - year - old daughter of producer Lindsey Collins. Lucia Geddes as teen Dory.
Document 15: President of Mexico: Currently, the office of the President is considered to be revolutionary, in that the powers of office are derived from the Revolutionary Constitution of 1917. Another legacy of the Revolution is its ban on re-election. Mexican presidents are limited to a single six - year term, called a sexenio. No one who has held the post, even on a caretaker basis, is allowed to run or serve again. The constitution and the office of the President closely follow the presidential system of government.
ground_truth: Enrique Peña Nieto
sub_queries: where is finding dory supposed to take place Answer: in California
the country of shares a border with in California Answer: Mexico
Mexico is led by a chief of state who is Answer: Enrique Peña Nieto