Question: Who was the Opera singer that married Peter Greenough?
Context: Peggy Clarke (née Wood) (born 1937) is joint British ladies' chess champion in 1966.  She was the daughter of Baruch Harold Wood and married Peter Hugh Clarke in 1962.  They had three daughters. Beverly Sills (May 25, 1929July 2, 2007) was an American operatic soprano whose peak career was between the 1950s and 1970s. Judith Mary Lumley had a career as an academic, author, public health advocate and perinatal researcher, retiring as Professor Emerita at La Trobe University in December 2008.  She was born Judith Mary Casey in Cardiff, Wales in 1941 and married Peter Lumley in 1964.  Lumley graduated from Cambridge University.  She emigrated to Australia in 1965 where she studied medicine, gaining her PhD in fetal physiology from Monash University. Elizabeth of Carinthia (1298–1352) was an influential queen and royal family member in the Kingdom of Sicily, who lived and ruled in a tumultuous time.  In 1323, she married Peter II of Sicily and became the Queen of Sicily.  During her time as Queen, Elizabeth ensured that the royal lineage of the Aragonese in Sicily continued.  Two sons eventually ascended the throne, Louis of Sicily and Frederick IV of Sicily.  Elizabeth was the regent for her young son Louis from 1348 until her death in 1352. Joseph Walton (born 1830, date of death unknown) was a convict transported to Western Australia.  The son of a watchmaker, Walton was born in Canada, but it was in England on 19 July 1851 that he was convicted of burglary and sentenced to ten years' penal servitude.  Walton was transported to Western Australia on the "Dudbrook", arriving in February 1853.  After obtaining his ticket of leave, he worked as a carpenter.  He received his conditional pardon in July 1856, and the following month he married Fanny Kenney.  Over the next few years he worked in the Avon and Greenough districts; his wife did not accompany him and the fact that he was married was not known.  Walton took up land at Greenough, and built a hotel there.  Later he won a number of contracts to build government buildings, including a one-room school, a police station and a courthouse. Peter B. Greenough (February 6, 1917 – September 6, 2006) was an American journalist and editor.  He was the husband of opera singer Beverly Sills. Densey Clyne (born Dorothy Denise Bell, 4 December 1922) is an Australian naturalist, photographer and writer, especially well known for her studies of spiders and insects.  She was born in Risca, Wales, United Kingdom, and moved to Australia in 1936.  During World War II she served as a commissioned officer in the Australian Women's Army Service, after a year in the Land Army.  She married Peter Clyne (1927–1987) in 1950.  Clyne lives in Wauchope, New South Wales. Giuseppina (or Giuseppa) Brambilla (9 May 1819 – April 1903) was an Italian opera singer who, like her sisters Marietta and Teresa Brambilla, sang leading roles in the major opera houses in Italy, Spain, France and England.  Although often described in modern reference works as a contralto, she also sang many soprano roles including Marie in "La fille du régiment" and Abigaille in "Nabucco".  She married the tenor Corrado Miraglia in 1857 and retired from the stage in 1862.  Her niece, Teresina Brambilla, was also an opera singer. The Lopukhin family was a noble family of the Russian Empire, forming one of the branches of the Sorokoumova-Glebov family.  One of its members, Eudoxia Lopukhina, married Peter the Great.  When Pyotr Lopukhin's son died childless, the family's princely title passed to Gioconda Vessichelli (born in Rome, Italy) is an opera singer.  Gioconda is the inventor and pioneer of BollywoOPERA style.  She has sung in the Bollywood movie "Prague "in 2013, and she has given her voice for the Bollywood movie "Mary Kom" on the song "Ziddi dil" together with Vishal Dadlani.On 19th May 2017 her song "Itni si baat hai" has been released by the label T-series.  On 20 December 2014 the song "Thodi Daaru" was released featuring Mika Singh.  Gioconda has done live performances as first fusion ever between opera and classical Hindi music with artists of the caliber of Grammy Award winner Sukhwinder Singh, Hari Haran, Gino Banks, Niladri Kumar, Silvaganesha, in festivals and auditoriums like Nehru Centre[20] in Mumbai.  She collaborates with Anup Jalota, and many others.  On 31 March 2016 her international video "We are one" in which she sings and acts together with Anup Jalota for peace in the world has been launched from the Minister of India in Delhi.  She is in the annual book of Italian opera singer for having sung in the first world edition of contemporary opera at "Teatro comunale di Modena", broadcast on Italian state radio RAI.  Gioconda is the first singer in the premiere world ever of the contemporary opera “Lavinia fuggita” by Matteo d’Amico.  She has two degrees in opera singing and musicology from Italian conservatory "Santa Cecilia" and international high school of opera "H.Wolf".  The tenor Luciano Pavarotti has been her teacher, among other opera singers who selected her as one of the best students.  She was selected as best singer at accademia rossiniana in Pesaro and she debuts the role of "Madama cortese" in "il viaggio a Reims" by Rossini with the symphonic orchestra of Rof at Rossini theatre in Pesaro.  She sings again in a Rossini opera at Ercolano international opera season in "Il barbiere di Siviglia" and at teatro Politeama opera season in Lecce.  After Rossini she debuts "Carmen" by Bizet.  Her interpretation of the role "Mimì" in the opera "La Boheme" by Puccini received positive critiques.
Answer: Beverly Sills