question: Which opera, if any,  Venus and Adonis or Bluebeard's Castle has more acts ?
answer: Venus and Adonis
context: Title: Opera in Latin America
  Passage: The history of opera in Latin America dates back to at least the early 18th century.  Opera arrived in Latin America as a consequence of European colonization.  On October 19, 1701, "La púrpura de la rosa" premiered in Lima in the Viceroyalty of Peru, the first opera known to be composed and performed in the Americas.  It is an opera in one act by Spanish composer Tomás de Torrejón y Velasco with a libretto by Pedro Calderón de la Barca, and is the only surviving opera by Torrejón y Velasco.  It tells the myth of the love of Venus and Adonis, which provoked Mars's jealousy and his desire for vengeance.
  Title: Bluebeard (ballet)
  Passage: Barbe-bleue (en.  "Bluebeard") (ru.  «Синяя борода», "Sinjaja boroda") is a "ballet-féerie" in three acts and seven scenes, originally choreographed by Marius Petipa to the music of Pyotr Schenk.  The libretto was created by the author and dramatist Countess Lydia Pashkova from the fairy tale "Bluebeard" by Charles Perrault.  The ballet was first presented by the Imperial Ballet on December 20 [O.S. December 8] 1896 at the Imperial Mariinsky Theatre in St. Petersburg, Russia, the first performance being a benefit in honor of Marius Petipa's fiftieth anniversary in service to the St. Petersburg Imperial Theatres.
  Title: Vénus et Adonis
  Passage: Vénus et Adonis is an opera ("tragédie en musique") in a prologue and 5 acts composed by Henri Desmarets to a libretto by Jean-Baptiste Rousseau.  Based on the story of Venus and Adonis in Book X of Ovid's "Metamorphoses", it was first performed by the Académie Royale de Musique at the Théâtre du Palais-Royal in Paris on 28 July 1697 with Marie Le Rochois and Louis Gaulard Dumesny in the title roles.  Desmarets staged a major revival of the work with a new prologue at the court of Leopold, Duke of Lorraine in 1707.  During the composer's lifetime, it was performed in Germany, Belgium, and France, but then fell into obscurity.  Its first staging in modern times took place at the Opéra de Nancy on 28 April 2006.
  Title: Venus and Adonis (opera)
  Passage: Venus and Adonis is an opera in three acts and a prologue by the English Baroque composer John Blow, composed in about 1683.  It was written for the court of King Charles II at either London or Windsor.  It is considered by some to be either a semi-opera or a masque, but "The New Grove" names it as the earliest known English opera.
  Title: The Death of Adonis (Rubens)
  Passage: The Death of Adonis is a c.1614 painting by Peter Paul Rubens, now in the Israel Museum in Jerusalem.  It shows the dead Adonis being mourned by Venus, Cupid and the Three Graces
  Title: Bluebeard's Castle
  Passage: Bluebeard's Castle (Hungarian: A kékszakállú herceg vára ; literally: "The Blue-Bearded Duke's Castle") is a one-act opera by Hungarian composer Béla Bartók.  The libretto was written by Béla Balázs, a poet and friend of the composer, and is written in Hungarian, based on the French literary tale "La Barbe bleue" by Charles Perrault.  The opera lasts only a little over an hour and there are only two singing characters onstage: Bluebeard ("Kékszakállú "), and his new wife Judith ("Judit " ); the two have just eloped and Judith is coming home to Bluebeard's castle for the first time.
citations: Venus and Adonis (opera) Bluebeard's Castle