Question: What is the current official currency in the country where Carlos Berrocal has citizenship?

full_context: Document 1: History of Puerto Rico: In 1898, during the Spanish -- American War, Puerto Rico was invaded and subsequently became a possession of the United States. The first years of the 20th century were marked by the struggle to obtain greater democratic rights from the United States. The Foraker Act of 1900, which established a civil government, and the Jones Act of 1917, which made Puerto Ricans U.S. citizens, paved the way for the drafting of Puerto Rico's Constitution and its approval by Congress and Puerto Rican voters in 1952. However, the political status of Puerto Rico, a Commonwealth controlled by the United States, remains an anomaly.
Document 2: Carles Sans: Carles Sans López (born May 25, 1975 in Barcelona, Spain) is a former water polo player from Spain, who was a member of the national team that won the gold medal at the 1996 Summer Olympics in Atlanta, United States.
Document 3: Gary Sheerer: Gary Peter Sheerer (born February 18, 1947) is a retired water polo player from the United States, who competed in two consecutive Summer Olympics for his native country, starting in 1968. He won the bronze medal with the Men's National Team at the 1972 Summer Olympics in Munich, West Germany. Sheerer was born in Berkeley, California.
Document 4: Republic of Cuba (1902–1959): After the Spanish -- American War, Spain and the United States signed the Treaty of Paris (1898), by which Spain ceded Puerto Rico, the Philippines, and Guam to the United States for the sum of $20 million. Cuba gained formal independence from the U.S. on May 20, 1902, as the Republic of Cuba. Under Cuba's new constitution, the U.S. retained the right to intervene in Cuban affairs and to supervise its finances and foreign relations. Under the Platt Amendment, the U.S. leased the Guantánamo Bay naval base from Cuba.
Document 5: History of Puerto Rico: After the ratification of the Treaty of Paris of 1898, Puerto Rico came under the military control of the United States of America. This brought about significant changes: the name of the island was changed to Porto Rico (it was changed back to Puerto Rico in 1932) and the currency was changed from the Puerto Rican peso to the United States dollar. Freedom of assembly, speech, press, and religion were decreed and an eight-hour day for government employees was established. A public school system was begun and the U.S. Postal service was extended to the island. The highway system was enlarged, and bridges over the more important rivers were constructed. The government lottery was abolished, cockfighting was forbidden, and a centralized public health service established. Health conditions were poor at the time, with high rates of infant mortality and numerous endemic diseases.
Document 6: Puerto Rico: Originally populated by the indigenous Taíno people, the island was claimed in 1493 by Christopher Columbus for the Crown of Castile during his second voyage. Later it endured invasion attempts from the French, Dutch, and British. Four centuries of Spanish colonial government transformed the island's ethnic, cultural and physical landscapes primarily with waves of African slaves, Canarian, and Andalusian settlers. In the Spanish imperial imagination, Puerto Rico played a secondary, but strategic role when compared to wealthier colonies like Peru and the mainland parts of New Spain. Spain's distant administrative control continued up to the end of the 19th century, helping to produce a distinctive creole Hispanic culture and language that combined elements from the Native Americans, Africans, and Iberians. In 1898, following the Spanish -- American War, the United States acquired Puerto Rico under the terms of the Treaty of Paris.
Document 7: Puerto Rico: Originally populated by the indigenous Taíno people, the island was claimed in 1493 by Christopher Columbus for Spain during his second voyage. Later it endured invasion attempts from the French, Dutch, and British. Four centuries of Spanish colonial government influenced the island's cultural landscapes with waves of African slaves, Canarian, and Andalusian settlers. In the Spanish Empire, Puerto Rico played a secondary, but strategic role when compared to wealthier colonies like Peru and the mainland parts of New Spain. Spain's distant administrative control continued up to the end of the 19th century, helping to produce a distinctive creole Hispanic culture and language that combined elements from the Native Americans, Africans, and Iberians. In 1898, following the Spanish -- American War, the United States acquired Puerto Rico under the terms of the Treaty of Paris. The treaty took effect on April 11, 1899.
Document 8: Carlos Romero Barceló: Carlos Antonio Romero Barceló (born September 4, 1932) is a Puerto Rican politician who served as the fifth Governor of the Commonwealth of Puerto Rico, the second governor to be elected from the New Progressive Party (PNP) and also Resident Commissioner of Puerto Rico from 1993 to 2001.
Document 9: Pedro Carrío: Pedro Carrió García (born 1970 in Havana) is a former international swimmer from Cuba, who participated in various international competitions for his native country, starting in 1982. He maintains the National Records in Cuban Swimming for Free Style 400 meters (1990), 1,500 meters (1991) and Free Style Relay 800 meters (1991).
Document 10: Ryan Berube: Ryan Thomas Berube (born December 26, 1973) is an American former competition swimmer and freestyle specialist who won the gold medal anchoring the U.S. men's team in the 4×200-meter freestyle relay at the 1996 Summer Olympics in Atlanta, Georgia.
Document 11: Manuel Guzmán: Manuel Guzmán Flores (born October 13, 1969) is a former international backstroke and freestyle swimmer from Puerto Rico, who participated in two consecutive Summer Olympics for his native country, starting in 1988. His best result was a 12th place in the Men's 4 × 100 m Freestyle Relay at the 1992 Summer Olympics in Barcelona, Spain. He graduated from Bloomington High School South in 1989 where he was an individual state champion and helped lead the team to a state runner-up finish.
Document 12: Puerto Rico: Originally populated by the indigenous Taíno people, the island was claimed in 1493 by Christopher Columbus for the Crown of Castile during his second voyage. Later it endured invasion attempts from the French, Dutch, and British. Four centuries of Spanish colonial government transformed the island's ethnic, cultural and physical landscapes primarily with waves of African slaves, and Canarian, and Andalusian settlers. In the Spanish imperial imagination, Puerto Rico played a secondary, but strategic role when compared to wealthier colonies like Peru and the mainland parts of New Spain. Spain's distant administrative control continued up to the end of the 19th century, helping to produce a distinctive creole Hispanic culture and language that combined elements from the Native Americans, Africans, and Iberians. In 1898, following the Spanish -- American War, the United States acquired Puerto Rico along with other Spanish colonies under the terms of the Treaty of Paris.
Document 13: Carlos Berrocal: Carlos Berrocal (born May 18, 1957) is a former backstroke and freestyle swimmer from Puerto Rico. He competed for his native country at the 1976 Summer Olympics in Montréal, Quebec, Canada.
Document 14: Puerto Rico: Originally populated by the indigenous Taíno people, the island was claimed in 1493 by Christopher Columbus for Spain during his second voyage. Later it endured invasion attempts from the French, Dutch, and British. Four centuries of Spanish colonial government influenced the island's cultural landscapes with waves of African slaves, Canarian, and Andalusian settlers. In the Spanish Empire, Puerto Rico played a secondary, but strategic role when compared to wealthier colonies like Peru and the mainland parts of New Spain. Spain's distant administrative control continued up to the end of the 19th century, helping to produce a distinctive creole Hispanic culture and language that combined elements from the Native Americans, Africans, and Iberians. In 1898, following the Spanish -- American War, the United States acquired Puerto Rico under the terms of the Treaty of Paris.
Document 15: Carlos Carsolio: Carlos Carsolio Larrea (born 4 October 1962 in Mexico City) is a Mexican mountain climber. Carsolio is known for being the fourth man (first non-European) and the second youngest to climb the world's 14 eight-thousander mountain peaks, all of them without supplementary oxygen (but he required emergency oxygen on his descent from Makalu in 1988).
ground_truth: United States dollar
sub_queries: Carlos Berrocal >> country of citizenship Answer: Puerto Rico
What is the current official currency in Puerto Rico ? Answer: United States dollar