Question: What is the current official currency in Joseph Serrano's country of citizenship?

full_context: Document 1: Juan René Serrano: Juan René Serrano Gutiérrez (born 23 February 1984 in Guadalajara, Jalisco) is an athlete from Mexico. He competes in archery.
Document 2: 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 3: Bernardo Piñango: José Bernardo Piñango (born February 9, 1960 in Caracas) is a retired professional boxer from Venezuela who held the WBA (twice), "The Ring" and lineal bantamweight titles. As an amateur boxer, he won a silver medal in the bantamweight division (-54 kg) at the 1980 Summer Olympics in Moscow. In the final he lost to Cuba's Juan Hernández on points (0-5).
Document 4: Joseph Serrano: Joseph Serrano (born April 18, 1984 in Caguas, Puerto Rico) is a Puerto Rican who was an amateur boxing star.
Document 5: 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 6: 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 7: 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 8: 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 9: Treaty of Paris (1898): The Treaty of Paris of 1898 (Filipino: "Kasunduan sa Paris ng 1898;" Spanish: "Tratado de París (1898)") was a treaty signed by Spain and the United States on December 10, 1898, that ended the Spanish–American War. In the treaty, Spain relinquished all claim of sovereignty over and title to Cuba, and ceded Puerto Rico, Guam, and the Philippines to the United States. The cession of the Philippines involved a compensation of $20 million from the United States to Spain. The Treaty of Paris came into effect on April 11, 1899, when the documents of ratification were exchanged.
Document 10: Javier Torres: Javier Torres (born May 14, 1988 in Artesia, California) is an undefeated Mexican American professional boxer in the Heavyweight division. Torres was the second rated U.S. amateur boxer in the Super Heavyweight division and a member of the Mexican Olympic team.
Document 11: Hugo Rafael Soto: Hugo Rafael Soto (born 16 August 1967 in San Fernando del Valle de Catamarca, Argentina) is a former professional boxer.
Document 12: 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 13: Morris East: Morris East (born August 8, 1973 in Olongapo, Philippines) is a retired Filipino professional boxer and boxing trainer. East is the former GAB Light Middleweight, OPBF and WBA World Light Welterweight champion. Morris has trained world champions Zab Judah and Nonito Donaire.
Document 14: Rafael Ramos (boxer): Rafael "Fito" Ramos (born January 1, 1965) is a retired boxer from Puerto Rico. He competed in the 1984 Summer Olympics and twice won a medal (gold and bronze) at the Pan American Games during his career.
Document 15: 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.
ground_truth: United States dollar
sub_queries: Joseph Serrano >> country of citizenship Answer: Puerto Rico
What is the current official currency in Puerto Rico ? Answer: United States dollar