Question: Which of these two act operas, Lucrezia Borgia or Il pirata, was based on a three-act melodrame? 

Related documents: [0]  [DOC] Il pirata ("The Pirate") is an opera in two acts by Vincenzo Bellini to an Italian libretto by Felice Romani which was based on a three-act mélodrame from 1826, "Bertram, ou le Pirate" ("Bertram, or The Pirate") by Charles Nodier and "Raimonde" (actually Isidore Justin Séverin Taylor). However, this play was itself based upon a French translation of the "five-act verse tragedy" "Bertram, or The Castle of St Aldobrando" by Charles Maturin which appeared in London in 1816. [END] 
[1]  [DOC] Lucrezia Borgia is a melodramatic opera in a prologue and two acts by Gaetano Donizetti. Felice Romani wrote the Italian libretto after the play "Lucrezia Borgia" by Victor Hugo, in its turn after the legend of Lucrezia Borgia. "Lucrezia Borgia" was first performed on 26 December 1833 at La Scala, Milan. [END]  
Answer: Il pirata
Il pirata