Question: Laura Don's son wrote a libretto for an operetta composed by which conductor?

full_context: Document 1: Laura Ingalls Wilder: Laura Ingalls Wilder ( ; February 7, 1867 – February 10, 1957) was an American writer known for the "Little House on the Prairie" series of children's books released from 1932 to 1943 which were based on her childhood in a settler and pioneer family.
Document 2: Operetta for the Theatre Organ: Operetta for the Theatre Organ is an album released by Leonard MacClain in 1957 on Epic Records LP record LN 3372. On release, J. Albert Fracht reviewed the album as "full of good playing." The album features music from Victor Herbert's "Red Mill", "The Fortune Teller" and "Mlle Modiste." Also featured are songs from Sigmund Romberg's "The Desert Song" and "The New Moon". Rudolf Friml is represented by songs from "The Firefly", and "Rose Marie".
Document 3: Paul Bunyan (operetta): Paul Bunyan, Op 17, is an operetta in two acts and a prologue composed by Benjamin Britten to a libretto by W. H. Auden, designed for performance by semi-professional groups. It premiered at Columbia University on 5 May 1941, to largely negative reviews, and was withdrawn by the composer. Britten revised it somewhat in 1976 and subsequently it had numerous performances and two commercial recordings. The story is based on the folkloric American lumberjack, Paul Bunyan, with the music incorporating a variety of American styles, including folk songs, blues and hymns. The work is strongly sectional in nature, highly reminiscent of the 'Broadway musical' style of the period.
Document 4: Louisa Medina: Louisa Medina (c.1813-1838), also known as Louisa Honore de Medina, Louisa Medina Hamblin, and the nickname Louisine, was a playwright and literary figure in New York City between the years 1833 and her death. She wrote poems, short stories, and approximately 34 melodramas of which only 11 remain extant. She is mostly known for adapting dramatic versions of Edward Bulwer-Lytton's"Last Days of Pompeii" (1835) and "Ernest Maltravers" (1838), and Robert Montgomery Bird's"Nick of the Woods" (1838), among others. In an era when successful plays typically ran 3-4 nights, "Last Days of Pompeii" set a record by running for twenty-nine days. This was the earliest known example of a "long run" for a play, a technique which became regularly used by Thomas Hamblin. Medina is also accredited as the first women in American Theatre to earn her living exclusively as a dramatist. Louisa Medina's progressive inclinations concerning her education and self-reliance marks her as an indicator of the rise of First-Wave Feminism in America.
Document 5: Sister Lauras Food Supplement: In the early 1900s Sister Laura Marian Smith, a nurse at the Glasgow Royal Maternity Hospital, noted the high levels of malnutrition in children at the time, and is credited with promoting the use of a Casein inhibitor to make cows milk more beneficial to those who had extreme difficulty in digesting it. By creating a powder formulae to mix with milk, it enabled it to become an effective aid to patient recovery. Although named after Sister Laura - this was a marketing strategy as the powder is said to have been developed by Dr Leonard Findlay, at the time a noted expert of infant dietary disorders at Rottenrow. Although Sister Laura was one of the original shareholders when the company when it was established in 1911, by 1920 she had sold her interests in the company, though it continued to expand, opening a purpose-built factory at Emerson Road West, Bishopbriggs.
Document 6: Laura Ingalls (disambiguation): Laura Ingalls (1867–1957) is the birth name of American writer Laura Ingalls Wilder, author of the "Little House on the Prairie" books.
Document 7: Naura Hayden: Naura Hayden, originally "Norah Helene Hayden" (September 29, 1930 – August 10, 2013) in New York, New York) was an author (under that name), who worked in entertainment also as Nora Hayden and in modeling as Helene Hayden and was the daughter of Los Angeles Times reporter John Hayden and his wife (née Bussens). An aunt was Phyllis McGinley Hayden. She was a long-time resident of New York City.
Document 8: Nathaniel D. Mann: Nathaniel D. Mann was an American composer best known for his work with L. Frank Baum. He composed at least two songs with Baum, "Different Ways of Making Love" and "It Happens Ev'ry Day," and another with John Slavin, "She Didn't Really Mind the Thing at All," for "The Wizard of Oz" stage musical in 1902, and in 1908, composed the first original film score (27 cues) for "The Fairylogue and Radio-Plays", one of the earliest feature-length fiction films (and the earliest film adaptations of the novels "The Wonderful Wizard of Oz", "The Marvelous Land of Oz", "Ozma of Oz", "John Dough and the Cherub", and "Dorothy and the Wizard in Oz", presented by Baum himself), which debuted September 24, 1908. With Baum, he also composed the musical "The King of Gee-Whiz" (dated February 23, 1905), which went through various titles such as "Montezuma" (November 1902), "King Jonah XIII" (September 1903), and "The Son of the Sun" (1905). This was collaboration with and based on a novel by Emerson Hough, which was never completed and the extant scenario published in 1969.
Document 9: Plays of L. Frank Baum: The plays of L. Frank Baum are an important aspect of Baum's writing career about which some of the least is known. While even most brief biographies, long before the Internet, have noted Baum's work as a playwright, these works have been rarely performed beyond his lifetime, and almost none have been published aside from two scenarios and a first act of three unfinished works in "The Musical Fantasies of L. Frank Baum", compiled with an introduction by Alla T. Ford. Aside from his youthful success with "The Maid of Arran", his blockbuster eight-year run with "The Wizard of Oz", his failure with "The Woggle-Bug", and "The Tik-Tok Man of Oz" as source material for his novel, "Tik-Tok of Oz", very little is known about his dramatic output, and mostly from the publications of Michael Patrick Hearn, Susan Ferrara, and Katharine M. Rogers. Hearn identifies 41 different titles in the bibliography of the 2000 edition of "The Annotated Wizard of Oz", plus one play without a title, although some of these titles clearly refer to drafts of the same play, such as the early titles of "The Tik-Tok Man of Oz".
Document 10: Babes in Toyland (operetta): Babes in Toyland is an operetta composed by Victor Herbert with a libretto by Glen MacDonough (1870–1924), which wove together various characters from Mother Goose nursery rhymes into a Christmas-themed musical extravaganza. Following the extraordinary success of their stage musical "The Wizard of Oz", which was produced in New York beginning in January 1903, producer Fred R. Hamlin and director Julian P. Mitchell hoped to create more family musicals. MacDonough had helped Mitchell with revisions to the "Oz" libretto by L. Frank Baum. Mitchell and MacDonough persuaded Victor Herbert to join the production. "Babes in Toyland" features some of Herbert's most famous songs – among them "Toyland", "March of the Toys", "Go To Sleep, Slumber Deep", and "I Can't Do the Sum". The theme song "Toyland", and the most famous instrumental piece from the operetta, "March of the Toys", occasionally show up on Christmas compilations.
Document 11: The Woggle-Bug (musical): The Woggle-Bug is a musical based on "The Marvelous Land of Oz" by L. Frank Baum, with book and lyrics by the author and music by Frederic Chapin that opened June 18, 1905 at the Garrick Theater in Chicago under the direction of Frank Smithson, a Shubert Organization employee. The musical was a major critical and commercial failure, running less than a month. Chapin, however, had proven quite saleable to the publisher, M. Witmark and Sons, and many of the songs were published. The music director was Frank Pallma. The surviving sheet music was published by Hungry Tiger Press in 2002.
Document 12: Laura Donnelly (actress): Laura Donnelly (born 20 August 1982) is an actress from Northern Ireland. She made her on-screen debut in 2005 in the Channel 4 drama "Sugar Rush", where she featured as a love interest of the female protagonist in two episodes. She is also known for appearing in "Casualty", "Hex", and as a main character in the Irish film "Insatiable" (2008). She also starred in "", a BBC drama on the life of George Best, playing Best's sister, Barbara. She starred in Jez Butterworth's new play, "The River" at the Royal Court Theatre, alongside Dominic West and Miranda Raison. She reprised her role in the Broadway production alongside Hugh Jackman.
Document 13: Laura Don: Laura Don (February 20, 1852 – February 10, 1886) was the pseudonym of Anna Laura Fish, an American actress, stage manager, playwright and artist whose life was taken by tuberculosis while still in her early thirties. She wrote the play "A Daughter of the Nile", that found its greater success after her death, and was the mother of the writer Glen MacDonough ("Babes in Toyland").
Document 14: Babes in Toyland (1961 film): Babes in Toyland is a 1961 American Technicolor Christmas musical film directed by Jack Donohue and distributed to theatres by Buena Vista Distribution. It stars Ray Bolger as Barnaby, Annette Funicello as Mary Contrary, Tommy Sands as Tom Piper, and Ed Wynn as the Toymaker.
Document 15: Prince Ananias: Prince Ananias was the first operetta composed by Victor Herbert. The libretto is by Francis Neilson. It was first produced by a troupe called "The Bostonians" at The Broadway Theatre on November 20, 1894, directed by Jerome Sykes. It remained in their repertoire for three seasons and was given more than 300 performances in all. A modest success at first, it did well on tour.
ground_truth: Victor Herbert