question: Which country was Dora Luz's work in The Three Caballeros premiered in? 
answer: Mexico
context: Title: Saludos Amigos
  Passage: Saludos Amigos (Spanish for "Greetings, Friends") is a 1942 American live-action animated package film produced by Walt Disney and released by RKO Radio Pictures.  It is the sixth Disney animated feature film and the first of the six package films produced by Walt Disney Productions in the 1940s.  Set in Latin America, it is made up of four different segments; Donald Duck stars in two of them and Goofy stars in one.  It also features the first appearance of José Carioca, the Brazilian cigar-smoking parrot.  "Saludos Amigos" was popular enough that Walt Disney decided to make another film about Latin America, "The Three Caballeros", to be produced two years later.  "Saludos Amigos" premiered in Rio de Janeiro on August 24, 1942.  It was released in the United States on February 6, 1943.  At 42 minutes, it is Disney's shortest animated feature to date.  It garnered positive reviews and was theatrically reissued in 1949, when it was shown on a double bill with the first reissue of "Dumbo".
  Title: Dora Luz
  Passage: Dora Luz is the stage name of a Mexican singer and recording artist.  She is known for her performance in Walt Disney's "The Three Caballeros" (1944), in which she sings Agustín Lara's "You Belong to My Heart" to Donald Duck.  She also recorded "Destino", by Armando Domínguez, for Disney and Salvador Dalí's "Destino" in 1945.
  Title: José de la Luz y Caballero
  Passage: José Cipriano de la Luz y Caballero (July 11, 1800 – June 22, 1862) was a Cuban scholar, acclaimed by José Martí as "the father ... the silent layer of foundations" in Cuban intellectual life of the 19th Century (see "Un magno artículo de Martí", in "Aforismos de Luz y Caballero" Havana, 1960, p. 139).  Interest in Luz's work was revived around the time of the Cuban Revolution, and new editions of his work published, as he was regarded as a source of intellectual autonomy for the country.
  Title: The Three Caballeros
  Passage: The Three Caballeros is a 1944 American live-action animated musical package film produced by Walt Disney and released by RKO Radio Pictures.  The film premiered in Mexico City on December 21, 1944.  It was released in the United States on February 3, 1945 and in the UK that March.  The seventh Disney animated feature film, the film plots an adventure through parts of Latin America, combining live-action and animation.  This is the second of the six package films released by Walt Disney Productions in the 1940s, following "Saludos Amigos" (1942).
  Title: Destino
  Passage: Destino is an animated short film released in 2003 by The Walt Disney Company.  "Destino" is unique in that its production originally began in 1945, 58 years before its eventual completion.  The project was originally a collaboration between Walt Disney and Spanish Surrealist painter Salvador Dalí, and features music written by Mexican songwriter Armando Domínguez and performed by Mexican singer Dora Luz.  It was included in the Animation Show of Shows in 2003.
  Title: The Three Caballeros Ride Again
  Passage: "The Three Caballeros Ride Again" is a Disney comic by Don Rosa.
citations: Dora Luz The Three Caballeros