Question: What is the name of the presidnetial yacht acquired by the Philippine government in 1959 and has hosted many guests including ballerina Margot Fonteyn?
Context: BRP "Ang Pangulo" (AT-25) is a presidential yacht and was acquired by the Philippine government in 1959.  The yacht was first used by President Carlos P. Garcia for entertaining and over the years the yacht has known many famous guests including British ballerina Margot Fonteyn, actress Brooke Shields, dancer Rudolf Nureyev, concert pianist Van Cliburn and Cristina Ford, former wife of Henry Ford II, who was once chairman of Ford Motor Co. Dame Alicia Markova DBE (1 December 1910 – 2 December 2004) was an English ballerina and a choreographer, director and teacher of classical ballet.  Most noted for her career with Sergei Diaghilev's Ballets Russes and touring internationally, she was widely considered to be one of the greatest classical ballet dancers of the twentieth century.  She was the first British dancer to become the principal dancer of a ballet company and, with Dame Margot Fonteyn, is one of only two English dancers to be recognised as a prima ballerina assoluta.  Markova was a founder dancer of the Rambert Dance Company, The Royal Ballet and American Ballet Theatre, and was co-founder and director of the English National Ballet. Roberto Emilio Arias (1918–1989), known as "Tito", was a Panamanian international lawyer, diplomat and journalist who was the husband of ballerina Dame Margot Fonteyn.  Arias was from a prominent Panamanian political family, whose members had reached the Presidency four times; amongst them his father Harmodio Arias. The Philippine Labor Migration Policy of the Philippine government allows and encourages emigration.  The Department of Foreign Affairs, which is one of the government's arms of emigration, grants Filipinos passports that allow entry to foreign countries.  The Philippine government enacted the Migrant Workers and Overseas Filipinos Act of 1995 (Republic Act 8042) in order to "institute the policies of overseas employment and establish a higher standard of protection and promotion of the welfare of migrant workers and their families and overseas Filipinos in distress." Dame Margot Fonteyn de Arias, DBE (18 May 191921 February 1991), was an English ballerina.  She spent her entire career as a dancer with the Royal Ballet, eventually being appointed "Prima Ballerina Assoluta" of the company by Queen Elizabeth II. Fonteyn & Nureyev on Broadway was presented at the George Gershwin Theatre (Uris Theatre), (18 November 1975 - 29 November 1975).  The show was a major Broadway and dance event; it was the farewell performance of the legendary ballet duo of Margot Fonteyn and Rudolf Nureyev.  The sold-out run included the Frederick Ashton ballet "Marguerite and Armand."  Other notable dancers included Lawrence Leritz, Daniel Lommel and The Murray Louis Dance Company. "Operation Big Bird" (Filipino: "Oplan Big Bird") was the attempt of the Philippine Government during the presidency of Corazon Aquino to recover the alleged US$7.5 billion of hidden accounts and assets of President Ferdinand Marcos and his family in the Swiss banks.  Conceived by Philippine banker Michael de Guzman, it commenced shortly after Marcos was forced into asylum in the United States.  Initially, Operation Big Bird did not recover any money with two differing reports by Representative Victorio Chaves and Senator Jovito Salonga.  Chaves laid the blame upon Salonga, Solicitor-General Sedfrey Ordoñez and the Swiss bank lawyers.  Salonga countered that Ordoñez had prevented the Philippine government from losing a large sum of money.  Evidence suggests that de Guzman acted in good faith on behalf of the new government but that a double cross may have been present. Lydia Diaz Cruz is a Prima Ballerina who started dancing in Havana, Cuba, and trained with Fernando Alonso and Alicia Alonso.  As a young dancer, she was talent-spotted by a well-known British dancer and teacher from an earlier era, Dame Phyllis Bedells, who traveled to Cuba and regarded her as the most naturally gifted dancer she'd seen since Margot Fonteyn.  Early marriage and exile from Cuba in the wake of the Castro revolution put a halt to her career, which she resumed after the birth of her third child in the early sixties.  She went on to dance in the United States with Ballet Concerto in Miami, became principal dancer with the National Ballet of Washington, D.C., and has performed in principal guest roles with the National Ballet of Venezuela, Washington Ballet, Ballet Spectacular.  She danced alongside many of the great artists of the day, including Margot Fonteyn and Melissa Hayden, among many others. Evadne Baker (August 19, 1937 – January 17, 1995) was a South African actress.  She was born in Cape Town, to parents of French, Dutch, and German heritage.  She trained as a ballerina from the age of six, and moved to England when she was nine to continue her training in London.  She later studied in Paris and Geneva under several prominent instructors, including Margot Fonteyn.  She supported herself by working as a model for "Vogue" magazine. Violetta Elvin (born 3 November 1924) is a retired Russian prima ballerina.  In 1986, "The Times" described Elvin as “the only rival ever to give Dame Margot Fonteyn a run for her money”.
Answer: BRP "Ang Pangulo"