Terttu Aulikki Rautawaara (May 2, 1906, Vaasa — December 29, 1990, Helsinki) was a Finnish soprano.
 She was famous for her interpretation of works by Edvard Grieg and Jean Sibelius, including some of the first recordings of Sibelius made outside Scandinavia.
 She played the part of Countess Almaviva in Mozart's "The Marriage of Figaro", in the first ever opera performed at the (1934), and continued to play a number of parts in operas staged in Glyndebourne in the 1930s.
 She recorded many duets with Peter Anders, among others.
 She also appeared in British and German films in the 1930s ("e.g." the German comedy "Alles hört auf mein Kommando").
 In 1945, Jean Sibelius dedicated the "Hymn to Thaïs" to her.
The International Jean Sibelius Violin Competition, named after Finnish composer Jean Sibelius, is a competition for violinists up to age 30.
 It is held every five years (-00 and -05) in Helsinki and is considered to be one of the most prestigious violin competitions in the world.
 The first competition took place in year 1965, eight years after the death of the composer.
 The competition is arranged by the Sibelius Society of Finland and the Sibelius Academy.
Sibelius Museum is a museum of music named after the Finnish composer Jean Sibelius located close to Turku Cathedral in the historical city centre of Turku in south-western Finland.
 It is the only museum totally devoted to music in Finland.
 The museum, designed by architect Woldemar Baeckman, was opened in 1968, and houses a collection of over 2000 historical musical instruments from around the world.
 The museum's archives include documents (sheet music, manuscripts, recordings, photos, concert programmes, etc.) from numerous composers, though primarily those of Sibelius.
 The building also contains a small concert hall, the Sibelius Hall, as well as an auditorium and even originally rooms set aside for the use of the Department of Musicology at Åbo Akademi University.
Jean Sibelius's Symphony No. 8 was his final major compositional project, occupying him intermittently from the mid-1920s until around 1938, though he never published it.
 During this time Sibelius was at the peak of his fame, a national figure in his native Finland and a composer of international stature.
 A fair copy of at least the first movement was made, but how much of the Eighth Symphony was completed is unknown.
 Sibelius repeatedly refused to release it for performance, though he continued to assert that he was working on it even after he had, according to later reports from his family, burned the score and associated material, probably in 1945.
Ida Georgina Moberg (b. 13 Feb 1859, d. 2 Aug 1947) was a Finnish composer and conductor.
 She was born in Helsinki, and took piano and singing lessons as a child.
 She studied at the Helsinki Philharmonic Orchestra School with Richard Faltin and Jean Sibelius, and at the St. Petersburg Conservatory.
 She continued her education at the Dresden Conservatory with Felix Draeseke and studied the Dalcroze method in Hellerau and Berlin.
The tone poem Pohjola's Daughter (Pohjolan tytär ), Op.
 49, was composed by the Finnish composer Jean Sibelius in 1906.
 Originally, Sibelius intended to title the work "Väinämöinen ", after the character in the "Kalevala " (the Finnish national epic).
 The publisher Robert Lienau insisted on the German title "Tochter des Nordens" ("Daughter of the North"), which means the same as the work's Finnish title, "Pohjolan tytär", but is traditionally translated as "Pohjola's Daughter" in English, which Sibelius then countered with the new title "L'aventure d'un héros ".
 He also considered the title "Luonnotar ".
 However, Lienau's suggestion eventually became the work's published title.
 (The title "Luonnotar " was given to a later work.)
 This was Sibelius' first work that he wrote directly for a German music publisher.
 The first performance was in Saint Petersburg, Russia in December 1906, with the composer himself conducting the Orchestra of the Mariinsky Theatre.
En saga (English translation: "A fairy tale" or "A saga") is a tone poem written by the Finnish composer Jean Sibelius in 1892.
 After hearing Sibelius's choral work "Kullervo", the conductor Robert Kajanus encouraged Sibelius to compose a purely orchestral piece, which eventually transpired into this work.
 The evolution of this work is rather vague, although it is known that in 1890–1891 Sibelius had begun composing an octet for strings, flute, and clarinet.
 The octet evolved into a septet by September 1892, and had acquired the title "Ballet Scene" No. 2 by November of that year.
 However, a letter to Adolf Paul dated 10 December 1892 stated that Sibelius had finished "the orchestral piece "En saga"".
Jean Sibelius ( ;    ), born Johan Julius Christian Sibelius (8 December 186520 September 1957), was a Finnish composer and violinist of the late Romantic and early-modern periods.
 He is widely recognized as his country's greatest composer and, through his music, is often credited with having helped Finland to develop a national identity during its struggle for independence from Russia.
The Wihuri Sibelius Prize is a music prize awarded by the Wihuri Foundation for International Prizes to prominent composers who have become internationally known and acknowledged.
 The Wihuri Sibelius Prize is one of the biggest and most prestigious music prizes in the world of classical music.
 The first Sibelius Prize was awarded to Finnish composer Jean Sibelius, whom the prize was named after, in 1953.
 By 2015, the Wihuri Foundation for International Prizes has awarded altogether 16 Wihuri Sibelius Prizes, the latest award climbing up to €150.000.
 The Wihuri Sibelius Prize winner is selected by a five-member committee that consists of experts from Finnish music institutions.
 The prize may be awarded to private individuals or organizations regardless of nationality, religion, race or language.
Ida Paulina Ekman (22 April 187514 April 1942) was a Finnish soprano singer.
 She was also referred to as Ida Morduch-Ekman.
 Her career was mainly in oratorio and lieder, and she was a renowned interpreter of the songs of Jean Sibelius, many of which were dedicated to her and her husband Karl Ekman, with whose career her own was closely connected.
 Sibelius regarded her as his favourite singer.

Question: What nationality were Ida Georgina Moburg and Jean Sibelius?
Answer: Finnish