Question: When was the Australian actress, known for originating the role of Glinda in the West End production of "Wicked" and performing with the Wharf Revue, born?

Context paragraphs:
Birgitte Hjort Sørensen: Birgitte Hjort Sørensen (born 16 January 1982) is a Danish actress.  She has been nominated for three Robert Awards and one Bodil Award.  Born in Hillerød and raised in Birkerød, Sørensen aspired to an acting career after watching the West End production of the musical "Chicago" while at school.  She graduated from the Danish National School of Performing Arts.  Her acting debut was in a minor role in the television series "The Eagle" in 2005.  She followed this by playing Roxie Hart in a Copenhagen production of "Chicago", and later on the West End.  Sørensen's breakthrough role was as journalist Katrine Fønsmark in the television political drama "Borgen" (2010–2013).

Gina Beck: Gina Beck (born 30 December 1981) is a British actress and singer known primarily for playing major roles in leading West End theatre productions.  She is best known for playing the role of Magnolia Hawks in Daniel Evans' acclaimed production of "Show Boat", Glinda the Good Witch in "Wicked", both in the UK production and the US tour, Christine Daaé in Cameron Mackintosh's production of Andrew Lloyd Webber's "The Phantom of the Opera" and Cosette in "Les Miserables".

Katie Rowley Jones: Katie Rowley Jones (born c. 1978) is a British musical theatre actress best known for her portrayal of Nessarose in the West End production of "Wicked" and Sister Mary Robert in the West End production of "Sister Act".

Wharf Revue: The Wharf Revue is a series of musical comedy revues presented by the Sydney Theatre Company.  Each show features four comedians - usually Jonathan Biggins, Phillip Scott and Drew Forsythe, accompanied by a female performer - satirising media personalities and political events in sketches and songs.  The music and lyrics are largely written by Scott.  Female Wharf Revue performers have included Amanda Bishop, Genevieve Lemon and Helen Dallimore (filling in).

Celinde Schoenmaker: Celinde Schoenmaker (born 15 January 1989) is a Dutch musical artist .  She studied Music at the Fontys Academy of Arts in Tilburg; she graduated this training in 2012 with summa cum laude honors.  At that time she had already been cast for the female lead in the Dutch version of Ghost the Musical , but this production was postponed indefinitely and never came to pass.  Since then, she has appeared as Fantine in the West End production of the musical Les Misérables and as Jenny Cavalleri in the Dutch touring production of Love Story.  From 7 September 2015 she has been playing in the West End production of The Phantom of the Opera in the role of Christine Daaè.

Helen Dallimore: Helen Dallimore (born 31 October 1971) is an Australian actress, known for originating the role of Glinda in the West End production of "Wicked".

Betty Ann Davies: Betty Ann Davies (24 December 1910 – 14 May 1955) was a British stage and film actress active from the 1920s to the 1950s.  She died young in 1955 aged 44 following an operation.  Miss Davies made her first stage appearance at the Palladium in a revue in 1924.  The following year she joined Cochran's Young Ladies in revues such as "One Dam Thing After Another" and "This Year of Grace".  Betty Ann Davies enjoyed a long and distinguished West End career which included "The Good Companions" 1934, "Morning Star" 1942, and "Blithe Spirit" 1943.  Her outstanding stage triumph was in the role of Blanche du Bois, which she took over from Vivien Leigh, in the original West End production of " A Streetcar Named Desire".  Miss Davis appeared in 38 films, and was active in TV at the time of her death.  She left one son Brook Blackford.

Oliver Tompsett: Oliver Tompsett (born 25 August 1981) is a British stage actor and singer best known for his portrayal of Fiyero in the West End production of the musical "Wicked" and for playing the role of Galileo in the West End Smash hit "We Will Rock You"

Chandra Lee Schwartz: Chandra Lee Schwartz (born August 18, 1981) is an American theatre performer, who most recently played Glinda on the First National Tour of "Wicked" from Friday, 21 August 2009, through Sunday, 17 April 2011.  She originally starred alongside Donna Vivino as Elphaba, who was later replaced by Jackie Burns.  Schwartz recently reprised the role of Glinda in the Broadway production of "Wicked" beginning September 27, 2011.  Her final performance was held on October 14, 2012 alongside former national tour co-star, Jackie Burns.  She returned to the role of Glinda on the First National Tour, on July 29, 2014, with Emma Hunton as Elphaba.  She closed the production, alongside Jennifer DiNoia as Elphaba, on March 15, 2015.  Schwartz was recently cast as Annie in the upcoming world premiere of a musical adaptation of "Sleepless in Seattle".

Louise Dearman: Louise Dearman (born 13 March 1979) is a British actress and singer, most well known for playing the roles of Glinda and Elphaba in the West End production of "Wicked."  Notably, she is the only actress to have played both starring roles in any production of "Wicked".  She has a number of other professional stage and television credits, such as Eva Perón in "Evita", Sarah Brown and Miss Adelaide in Guys and Dolls, and Daisy Hilton in Side Show.  She released her solo albums, "You and I", "Here Comes the Sun" and "It's Time", in 2005, 2012 and 2013 respectively.

Supporting paragraphs: Wharf Revue Helen Dallimore
Answer: born 31 October 1971