Question: Falsettos was a musical by which stage director and librettist?
Context: Adelaide Bishop (23 June 1928 – 20 June 2008) was an American operatic soprano, musical theatre actress, opera director, stage director, and voice teacher.  She began her career appearing in Broadway musicals as a teenager during the early 1940s.  She became a principal soprano with the New York City Opera (NYCO) in 1948, where she performed through 1960 in a broad repertoire encompassing German, French, Italian, and English operas from a variety of musical periods.  In the late 1950s, she started working actively as a stage director and as a voice teacher, working with many opera companies throughout the United States and serving on the music faculties of several different American universities.  She also served as the artistic director of the Wolf Trap Opera for many years. Michel-Antoine Carré or Michel Carré (fils) (7 February 1865, Paris – 11 August 1945, Paris) was a French actor, librettist, stage director and film director.  He was the son of the librettist Michel Carré (1821–1872) and cousin of the theatre director Albert Carré (his father's nephew).  His libretto for André Messager's 1894 opera "Mirette" was never performed in France but was later performed in an English adaptation in London at the Savoy Theatre.  His notable films included the 1909 short "Ordre du roy".  He also collaborated with André Barde on the libretto for Joseph Szulc's 1933 three-act operetta "Le Garçon de chez Prunier". Herschel Garfein is a Grammy Award-winning American composer, librettist, stage director, and faculty member of the Steinhardt School of Music at New York University, where he teaches Script Analysis.  Garfein is widely known for his libretto written for Robert Aldridge's "Elmer Gantry," which won two 2012 Grammy Awards including "Best Contemporary Classical Composition" won by Garfein and Aldridge.  He also collaborated with Aldridge on the oratorio "Parables".  In his compositions for the musical "Suenos" he found an inspiration in Hispanic rhythms.  Garfein also composed the music and libretto for an opera based on the Tom Stoppard play "Rosencrantz and Guildenstern are Dead". James Elliot Lapine (born January 10, 1949) is an American stage director, playwright, screenwriter, and librettist.  He has won the Tony Award for Best Book of a Musical three times, for "Into the Woods", "Falsettos", and "Passion".  He has frequently collaborated with Stephen Sondheim and William Finn. Falsettos is a musical with a book by James Lapine and William Finn, and music and lyrics by Finn.  The musical consists of "March of the Falsettos" and "Falsettoland", the last two installments in one trio of one-act Off-Broadway musicals (the first was "In Trousers").  The story involves Marvin, his ex-wife Trina, his psychiatrist Mendel, his son Jason, his gay lover Whizzer Brown, and his neighbors Cordelia and Dr. Charlotte.  The musical premiered on Broadway in 1992 and was nominated for seven Tony Awards, of which it won Best Book of a Musical and Best Original Score.  It was revived briefly on Broadway in 2016, and the revival performance was nominated for five Tony Awards. Neil Peter Jampolis is a light designer, set designer, and stage director.  He is best known for the light designing he did for the Royal Shakespeare Theatre’s 1975 production of "Sherlock Holmes" for which he won a Tony Award and a Drama Desk Award.  Jampolis went on to win an American Theatre Wing Hewes Design Award in 1982 and three more Tony Award nominations for "The Innocents", "Black and Blue", and "Orpheus Descending".  He also won a Los Angeles Drama Critics Circle Award for lighting Lily Tomlin and Jane Wagner's "Signs of Intelligent Life in the Universe".  Jampolis has also worked as either a light designer, set designer, or stage director with Pilobolus Dance Theatre the Vienna State Opera, La Scala, the Metropolitan Opera, the Santa Fe Opera, Opera Pacific, the New York City Opera, Pasadena Playhouse, and Hollywood's Matrix Theatre among others.  He is currently one of the main light designers for the Seattle Opera and a distinguished professor of theatre at UCLA's School of Theatre, Film, and Television.  He also occasionally works as a stage director and set designer for Seattle Opera as well. Giovacchino Forzano (] ; 19 November 1884 – 28 October 1970) was an Italian playwright, librettist, stage director, and film director.  A resourceful writer, he authored numerous popular plays and produced opera librettos for most of the major Italian composers of the early twentieth century, including the librettos for Giacomo Puccini's "Suor Angelica" and "Gianni Schicchi". Regieoper (German for "director's opera") is a form of Regietheater specific to opera.  In Regieoper, the stage director assumes a central role in determining the concept of an opera, often exchanging the established traditions related to that opera for an approach that may or may not adhere to the composer's or librettist's original intention.  The director's approach may include but is not limited to changing the staging intended by the composer or librettist, modernizing the story to reflect contemporary political controversies, and infusing the production with shock value (most often, sexuality). Nathaniel Merrill (February 8, 1927 – September 9, 2008) was a celebrated American stage director and opera director.  He was the resident stage director at the Metropolitan Opera from 1956-1985.  During his 28 seasons at the Met he staged a total of 14 new productions in addition to directing several revivals.  He also served as the Artistic Director of Central City Opera from 1959-1966.  In 1981 he and his wife, conductor Louise Sherman, founded Opera Colorado.  Merrill served as the company's artistic director and stage director and his wife worked as the company's musical director.  Upon his wife's death from cancer in 1998, Merrill retired and thereafter lived in Denver until his death of complications related to Alzheimer's disease a decade later. Claes Fellbom (born 29 January 1943) is a Swedish film director, screenwriter, and composer, and a librettist and opera stage director.  He is the founder and managing director of Folkoperan.
Answer: James Elliot Lapine