Thomas Carey (29 December 1931 – 23 January 2002) was an American operatic baritone.
 Born in Bennettsville, South Carolina, he served in the United States military during the Korean War.
 After leaving the service he studied singing at the Henry Street Settlement and at City College of New York.
 In 1970 he performed the role of Mel in the world premiere of Michael Tippett's "The Knot Garden" at the Royal Opera House in London.
 From 1969 until his death of pancreatic cancer in Norman, Oklahoma he taught on the voice faculty of the University of Oklahoma.
 He was married for many years to the contralto Carol Brice who had pre-deceased him in 1985.
The Knot Garden is the third opera by composer Michael Tippett for which he wrote the original English libretto.
 The work had its first performance at the Royal Opera House, Covent Garden, on 2 December 1970 conducted by Sir Colin Davis and produced by Sir Peter Hall.
 There is a recording with the original cast.
James Gilchrist is a British tenor specialising in recital and oratorio singing.
 He began his working life as a doctor, turning to a full-time music career in 1996.
 In concert he has performed among others, Benjamin Britten's "Serenade for Tenor, Horn and Strings" with the Manchester Camerata and the Northern Sinfonia, Elgar's "The Dream of Gerontius" with the Scottish Chamber Orchestra, Tippett's "The Knot Garden" with the BBC Symphony Orchestra and Sir Andrew Davis, Bach's Christmas Oratorio with the Zurich Tonhalle Orchestra under Ton Koopman, the St Matthew Passion at the Concertgebouw, "Pulcinella" with the Ensemble orchestral de Paris, and "Die Jahreszeiten" with the Saint Louis Symphony Orchestra and with the Handel and Haydn Society at the BBC Proms.
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.
A knot garden is a garden of very formal design in a square frame, consisting of a variety of aromatic plants and culinary herbs including germander, marjoram, thyme, southernwood, lemon balm, hyssop, costmary, acanthus, mallow, chamomile, rosemary, Calendulas, Violas and Santolina.
 Most knot gardens now have edges made from box ("Buxus sempervirens"), whose leaves have a sweet smell when bruised.
 The paths in between are usually laid with fine gravel.
 However, the original designs of knot gardens did not have the low box hedges, and knot gardens with such hedges might more accurately be called parterres.
Anna Elisabeth Söderström {'1': ", '2': ", '3': 'CBE', '4': "} (married name Olow; 7 May 192720 November 2009) was a Swedish soprano who performed both opera and song, and was known as a leading interpreter of the works of Janáček, Rachmaninov and Sibelius.
 She was particularly well known for her recordings of the lead soprano roles in the three Janáček operas "Jenůfa", "Káťa Kabanová", and "The Makropoulos Affair", all of which received "Gramophone" Awards.
 The "Gramophone" critic John Warrack described her portrayal of Káťa Kabanová as "establishing by an infinity of subtle touches and discreet, sensitive singing the picture of Káta as the richest and most human character in the drama."
Eve Queler (born January 11, 1931) is an American conductor and the "emerita" Artistic Director of the Opera Orchestra of New York (OONY).
 She founded the OONY in 1971, after having worked on the staff of the Metropolitan Opera and the New York City Opera.
 She is notable for her advocacy for, and conducting of, lesser known and less-frequently performed operas, such as "Rienzi" and "Jenůfa".
Jenůfa    (Její pastorkyňa, "Her Stepdaughter" in Czech) is an opera in three acts by Leoš Janáček to a Czech libretto by the composer, based on the play "Její pastorkyňa" by Gabriela Preissová.
 It was first performed at the Brno Theater, Brno, 21 January 1904.
 It was written between 1896 and 1902, and counts among the first operas written in prose.
Polly Park is an amateur gardener who created, with her husband Peter, the garden 'Boxford' at her suburban house in Red Hill in Canberra, Australia.
 She was United States born, and travelled around many parts of the world with her husband.
 In her garden she created separate sections, in which she experimented with the garden styles of different countries.
 These include several types, from an English knot to Indian.
 She described the garden in her book "The World in My Garden".
 The fascination of the garden is the successful concentration of effort and imagination within a half acre house block.
 The garden was recorded by the National Trust.
The Royal Opera House is an opera house and major performing arts venue in Covent Garden, central London.
 The large building is often referred to as simply "Covent Garden", after a previous use of the site of the opera house's original construction in 1732.
 It is the home of The Royal Opera, The Royal Ballet, and the Orchestra of the Royal Opera House.
 Originally called the Theatre Royal, it served primarily as a playhouse for the first hundred years of its history.
 In 1734, the first ballet was presented.
 A year later, Handel's first season of operas began.
 Many of his operas and oratorios were specifically written for Covent Garden and had their premieres there.

Question: Are Jenůfa and The Knot Garden operas?
Answer: yes