Question: How many acts were in the opera that was the first performance at the New Theatre?

Context paragraphs:
The Bartered Bride: The Bartered Bride (, "The Sold Bride") is a comic opera in three acts by the Czech composer Bedřich Smetana, to a libretto by Karel Sabina.  The work is generally regarded as a major contribution towards the development of Czech music.  It was composed during the period 1863–66, and first performed at the Provisional Theatre, Prague, on 30 May 1866 in a two-act format with spoken dialogue.

New Theatre (Plzeň): The New Theatre (Czech: Nové divadlo ) in Plzeň is a theatre.  Construction of the venue cost 880 million CZK.  The first performance at the New Theatre was "The Bartered Bride" from Bedřich Smetana.

Teatro Nuovo (Naples): The Teatro Nuovo (New Theatre) is a theatre located on Via Montecalvario in the Quartieri Spagnoli district of Naples.  The original theatre was an opera house designed by Domenico Antonio Vaccaro.  Completed in 1724, it was also known as the Teatro Nuovo sopra Toledo and the Teatro Nuovo de Montecalvario.  The theatre specialised in the "opera buffa" genre and saw the world premieres of hundreds of operas in its heyday.  These included fifteen of Cimarosa's operas and seven of Donizetti's.  The present theatre is the third to have been erected on the site following its destruction by fire in 1861 and again in 1935.

The Party (play): The Party is a play by the British dramatist, actor and director Jane Arden (1927–82) which was first staged at the New Theatre, London on 28 May 1958.  The play was directed by Charles Laughton and starred, in addition to Laughton himself, Albert Finney, Laughton's wife Elsa Lanchester, Ann Lynn, Joyce Redman, and John Welch.  Following generally enthusiastic reviews "The Party" ran for six months at the New Theatre and has occasionally been performed in repertory since.  The play was published by Samuel French Limited.

Homer Curran: Homer F. Curran (1885–1952) was an American theatrical producer who had a profound impact on the development of professional theatre on the West Coast of the United States during the first half of the 20th century.  Born in Springfield, Missouri, he was educated at Stanford University.  After graduating, he purchased and operated the Cort Theatre in San Francisco and temporarily changed its named to the Curran Theatre.  In 1921, construction began on a new theatre which opened in 1922 as the Curran Theatre.  This is the same theatre that operates under that name today.  In 1939 he founded the San Francisco Light Opera Company which for many years worked in partnership with the Los Angeles Civic Light Opera.  Throughout his years operating the Curran Theatre, he also established partnerships with the Shubert Organization as well as the Theatre Guild.  He notably co-authored the books for the operetta "Song of Norway" and the musical "".

The Doctor of Myddfai: The Doctor of Myddfai is an opera in two acts composed by Peter Maxwell Davies to a libretto by David Pountney.  The work premiered at the New Theatre in Cardiff on 5 June 1996, performed by the Welsh National Opera and conducted by Richard Armstrong.  The libretto was adapted from an ancient Welsh legend which inspired "The Lady of the Lake".  The original tale is reinterpreted in terms of a mysterious disease, knowledge of which the authorities are trying to suppress.  The opera takes place in a totalitarian society similar to that envisioned in Orwell's "1984", with a supreme ruler, mechanistic bureaucracy and endless war.

Prime Stage Theatre: Prime Stage Theatre is a professional theatre company located in Pittsburgh, Pennsylvania, USA creates a blend of educational programs and theatrical productions families, middle school and high school students, educators, and theatre patrons.  Its mission is to "entertain, educate, and enrich families, students, and educators in the discovery of live theatre and literature...by producing adaptations of literature, new works, and programs that address relevant topics of teens and adults."  Founded in 1996 by artistic director Wayne Brinda, the company has produced over 65 productions including 9 world and regional premieres and three scripts that are published and produced around the country.  The theatre's first production was "A Woman Called Truth" staged at the Station Square Playhouse.  The theatre then moved to La Roche College, where it produced two full seasons.  In 1998, the theatre moved to Pittsburgh Civic Light Opera Academy for one season, followed by its production of "Clemente: The Measure of a Man" at Point Park University's George White Theatre in 1999.  In 2000, Prime Stage produced works at the New Hazlett Theatre, until it inaugurated a new theatre facility at 937 Liberty Avenue in 2003, a space now inhabited by Bricolage Production Company and Pittsburgh Playwrights Theatre Company.  In 2006, Prime Stage returned to the New Hazlett, where it has continued to produce theatrical adaptations of literary classics and classic plays.  Prime Stage has also staged productions as part of the Pittsburgh New Works Festival.

Holliday Street Theater: The Holliday Street Theater also known as the New Theatre, New Holliday, Old Holliday, The Baltimore Theatre, and Old Drury, was a historical theatrical venue in colonial Baltimore, Maryland.  It is known for showing the first performance of Francis Scott Key's Star-Spangled Banner.

The Great Escape (festival): The Great Escape was a music festival held at Newington Armory, located within Sydney Olympic Park that took place in 2006 and 2007.  Initially held over the Easter long weekend for the first two events, in 2008 it was announced the festival would take place on the Labour Day weekend, however the event was cancelled 2 months from the date due to poor ticket sales .  It evolved from the 2005 Cockatoo Island Music Festival.  The music and other attractions run over three full days (Good Friday to Easter Sunday in 2006–07), with some patrons camping from Thursday evening to Monday morning.  Punters could attend either for the full weekend camping, purchase a 3-day pass and commute each day or attend a single day.  Many acts also played the East Coast Blues & Roots Music Festival the same weekend, however The Great Escape line-up is more diverse featuring pop, hip hop, electronic and rock acts that would not fit into a Blues and Roots line-up.  In addition to musical acts, there is also a wide range of other features such as comedy acts, bingo and trivia, conspiracy theory talks and yoga.  There is no immediate future for the Great Escape at this point, but organisers are confident it will be resurrected in the near future.

Hull New Theatre: The Hull New Theatre is a theatre in Kingston upon Hull, East Riding of Yorkshire, England.  It opened in 1939 as a successor to the Hull Repertory Theatre Company.  The Hull New Theatre features musicals, opera, ballet, drama, children's shows and one-night performances, with a highlight of the year being the annual Christmas pantomime.

Supporting paragraphs: New Theatre (Plzeň) The Bartered Bride
Answer: three