Question: The Alliance Theatre staged its first production, a semi-opera with how many acts, at the Alliance in 1968?

Context paragraphs:
King Arthur (opera): King Arthur, or The British Worthy (Z. 628), is a semi-opera in five acts with music by Henry Purcell and a

Alliance Theatre: The Alliance Theatre is a theater company in Atlanta, Georgia, based at the Alliance Theatre, part of the Robert W. Woodruff Arts Center, and is the winner of the 2007 Regional Theatre Tony Award.  The company, originally the Atlanta Municipal Theatre, staged its first production ("King Arthur") at the Alliance in 1968.  The following year the company became the Alliance Theatre Company.

Richard Coeur de Lion (play): Richard Coeur de Lion: An historical romance is a 1786 semi-opera with an English text by John Burgoyne set to music by Thomas Linley the Elder.  It was first staged at Drury Lane Theatre in October 1786.  It was a translation of Michel-Jean Sedaine's opera "Richard Coeur-de-lion" about the life of the English Monarch Richard I with the ending significantly changed.  The work was a major success and ran for 43 performances and was revived seven times before the end of the century.  By contrast a rival version staged at the Covent Garden Theatre at the same time was a failure.

Bethany Anne Lind: Bethany Anne Lind is an American stage and screen actor in Atlanta, Georgia and New York City, New York.  She is best known for creating roles in world premieres such as Margo in "Carapace"" (at Alliance Theatre), Olivia in "26 Miles" (at Alliance Theatre), and Dora in "The Storytelling Ability of a Boy" (at Florida Stage).

Woodruff Arts Center: Woodruff Arts Center is a visual and performing arts center located in Atlanta, Georgia.  The center houses three not-for-profit arts divisions on one campus.  Opened in 1968, the Woodruff Arts Center is home to the Alliance Theatre, the Atlanta Symphony Orchestra, and the High Museum of Art.

Gentrification of Atlanta: The gentrification of Atlanta has been the source of both praise and condemnation.  Gentrification of Atlanta's inner-city neighborhoods began in the 1970s, and it has continued, at varying levels of intensity, into the present.  Many factors have contributed to the city's gentrification.  A major increase in gentrification that occurred in the last years of the twentieth century has been attributed to the 1996 Summer Olympics.  However, during the 2000s, Atlanta underwent a profound transformation demographically, physically, and culturally.  Suburbanization, rising prices, a booming economy, and new migrants decreased the city’s black percentage from a high of 67% in 1990 to 54% in 2010.  From 2000 to 2010, Atlanta gained 22,763 white residents, 5,142 Asian residents, and 3,095 Hispanic residents, while the city’s black population decreased by 31,678.  Much of the city’s demographic change during the decade was driven by young, college-educated professionals: from 2000 to 2009, the three-mile radius surrounding Downtown Atlanta gained 9,722 residents aged 25 to 34 holding at least a four-year degree, an increase of 61%.  Between the mid-1990s and 2010, stimulated by funding from the HOPE VI program, Atlanta demolished nearly all of its public housing, a total of 17,000 units and about 10% of all housing units in the city.  In 2005, the $2.8 billion BeltLine project was adopted, with the stated goals of converting a disused 22-mile freight railroad loop that surrounds the central city into an art-filled multi-use trail and increasing the city’s park space by 40%.  Lastly, Atlanta’s cultural offerings expanded during the 2000s: the High Museum of Art doubled in size; the Alliance Theatre won a Tony Award; and numerous art galleries were established on the once-industrial Westside.

Gillian Plowman: Gillian Plowman is an award-winning English playwright.  She is the author of more than 20 plays.  She won the 1988 Verity Bargate Award for her play "Me and My Friend".  Originally staged at the Soho Poly, it was later revived at the Chichester Festival and at the Orange Tree Theatre.  In 2008, the Oval House Theatre staged her play "Yours Abundantly, From Zimbabwe".

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.

Ghost Brothers of Darkland County: Ghost Brothers of Darkland County is a musical by John Mellencamp, Stephen King, and T Bone Burnett.  It debuted at the Alliance Theatre in Atlanta, Georgia, in 2012.  A touring production began in late 2013 through the South and Midwest.  A soundtrack was released featuring country, folk, and rock musicians.

Henrietta Valor: Henrietta Valor (April 28, 1935 – November 23, 2007) was an actress and singer who starred on Broadway in, “Jacques Brel is Alive and Well and Living in Paris”.  Other Broadway credits include, “Half a Sixpence”, “Applause”, and “Annie”.  Off-Broadway she played a leading role in “Fashion”, which she reprised twenty years later at The Pasadena Playhouse.  She toured extensively for the USO in Europe, Africa, and the Far East including Viet Nam.  Her regional theatre credits include: The Studio Arena Stage in Buffalo, The Alliance Theatre in Atlanta, A.C.T. in Seattle, The Williamstown Theatre in Mass., PAF Playhouse in Huntington, Long Island, Playwrights Horizons in New York, The Boston Shakespeare Company, and three seasons in the acting company of The Guthrie Theatre in Minneapolis.  She studied opera on scholarship with Lotte Lehmann in Santa Barbara and acting with Alvina Krause at Northwestern University where she received her Bachelor of Music degree.  She was a runner-up in the Metropolitan Opera Auditions in New York City.  Her last acting role was Miss Framer in, “Lettice and Lovage” at The Pasadena Playhouse.

Supporting paragraphs: Alliance Theatre King Arthur (opera)
Answer: five