Question: What is the birthdate of this Australian dramatic coloratura soprano, who taught Simon Gilbert?

Passages:
Sylvie Valayre (born 1964, Paris) is a French operatic soprano known for her versatile interpretations of lyric, spinto, and dramatic coloratura soprano parts.  She sings grueling roles like Abigaille, Lady Macbeth or Turandot as well as lighter pieces like Giordano's Maddalena, Cio-Cio San (Madama Butterfly), or Verdi's Desdemona at major opera houses around the world. Isabella Angela Colbran (2 February 1785 – 7 October 1845) was a Spanish opera singer known in her native country as Isabel Colbrandt.  Many sources note her as a dramatic coloratura soprano but some believe that she was a mezzo-soprano with a high extension, a soprano sfogato.  She collaborated with opera composer Gioachino Rossini in the creation of a number of roles that remain in the repertory to this day; they were married on 22 March 1822.  She was the composer of four collections of songs. Desirée Rancatore (born 1977 in Palermo, Sicily) is an Italian dramatic coloratura soprano with an active career on the opera and concert stages of Europe. Marie Wilt (also Maria Vilda and Marie Liebenthaler) (30 January 1833 – 24 September 1891) was an Austrian dramatic coloratura soprano.  Possessing a wide vocal range with a significant amount of power and flexibility, Wilt sang a wide repertoire that encompassed the operas of Wolfgang Amadeus Mozart, the German operas of Richard Wagner, the grand operas of Giuseppe Verdi, and the bel canto operas of Bellini, Rossini, and Donizetti.  She sang for many years at the Vienna Hofoper (now Vienna State Opera) and for a number of seasons at the Royal Opera House, Covent Garden in London.  She notably portrayed the role of Sulamith in the world premiere of Karl Goldmark's "Die Königin von Saba" in 1875.  Also a regular performer of the concert repertoire, Wilt often appeared in performances of works by Beethoven, Haydn, and Mendelssohn. Richard Alan Bonynge ( ) (born 29 September 1930) is an Australian conductor and pianist.  He is the widower of Australian dramatic coloratura soprano Dame Joan Sutherland.  Bonynge conducted virtually all of Sutherland's operatic performances from 1962 until her retirement in 1990. Rebeka Bobanj (born June 5, 1981 in Subotica) is a Hungarian dramatic coloratura soprano. Simon Gilbert (born 6 October 1937 in Hendon, London) is an English actor and tenor.  At the age of twenty one he took singing lessons with the teachers of the Australian soprano Joan Sutherland.  Gilbert gradually gravitated towards Opera and The Edinburgh Festival, where sang with Sutherland (in Haydn’s "Orfeo") and Luciano Pavarotti (in "I Capuleti e i Montecchi").  In 1967, he sang with Scottish Opera, for example appearing in "L'anima del filosofo".  Joining The Adelphi Theatre's company for the musical "Show Boat", he played lead man to the show's star, Cleo Laine. Caterina Mancini (November 10, 1924 - January 21, 2011) was an Italian dramatic coloratura soprano, primarily active in Italy in the 1950s. Dame Joan Alston Sutherland, OM, AC, DBE (7 November 192610 October 2010) was an Australian dramatic coloratura soprano noted for her contribution to the renaissance of the bel canto repertoire from the late 1950s through to the 1980s. Nino Machaidze (Georgian: ნინო მაჩაიძე; born 1983, Tbilisi) is a Georgian Lyric Dramatic coloratura soprano.

Supporting sentences:
Simon Gilbert (born 6 October 1937 in Hendon, London) is an English actor and tenor.  At the age of twenty one he took singing lessons with the teachers of the Australian soprano Joan Sutherland. Dame Joan Alston Sutherland, OM, AC, DBE (7 November 192610 October 2010) was an Australian dramatic coloratura soprano noted for her contribution to the renaissance of the bel canto repertoire from the late 1950s through to the 1980s.