Sviatoslav Nikolayevich Knushevitsky (also seen as Knushevitzky; 6 January 1908 [O.S. 24 December 1907] 19 February 1963) was a Soviet-Russian classical cellist.
 He was particularly noted for his partnership with the violinist David Oistrakh and the pianist Lev Oborin in a renowned piano trio from 1940 until his death.
 After Mstislav Rostropovich and Daniil Shafran, he is spoken of as one of the pre-eminent Russian cellists of the 20th century.
Daniil Borisovich Shafran (Russian: Даниил Борисович Шафран , January 13, 1923February 7, 1997) was a Soviet Russian cellist.
Anton Ginsburg (18 September 1930 – 19 July 2002) was a Russian pianist.
 He was born in Moscow.
 A disciple of Heinrich Neuhaus, he graduated from the Moscow Conservatory in 1953.
 Four years later he won the Smetana Competition in Prague.
 Ginsburg has been active as a concert pianist both in the USSR and abroad, but is best remembered for his work as an accompanist with Daniil Shafran.
The Russian cellist Leonid Gorokhov (born 1967 in Saint Petersburg) studied at the St. Petersburg Conservatoire with Anatoli Nikitin and took part in masterclasses with Daniil Shafran.
 Winner of Concertino Praga (First Prize) and Paris Chamber Music Competition (Premier Grand Prix), Leonid Gorokhov is the only Russian cellist to be awarded the Grand Prix and the First Prize of the Geneva Concours (1986).
 In 1995 the European Association for Encouragement of the Arts awarded the Cultural Achievement Prize to Leonid Gorokhov for exceptional talent and outstanding artistic accomplishment.
Kapellmeister (] ) is a German word designating a person in charge of music-making.
 The word is a compound, consisting of the roots "Kapelle " ("choir", "orchestra", or originally, "chapel") and "Meister " ("master").
 Thus, the word was originally used to refer to somebody in charge of music in a chapel.
 However, the term has evolved considerably in its meaning in response to changes in the musical profession.
Chickering Hall (est.1883) was a concert auditorium in Boston, Massachusetts, in the late 19th century.
 It occupied the second floor of Chickering and Sons showrooms on Tremont Street, near the corner of West Street. "
Bradlee, Winslow and Wetherell were the architects, and Mr. E.P. Treadwell, the decorator.
 The hall [was] lighted by the Edison electric light."
 By 1895: "Tremont St., towards Boylston, for some years has been called Piano Row, for a long row of piano agencies occupied a good portion of the block; but of late most of these have migrated to Boylston St. Chickering Hall, at 152 Tremont St., was for many years a favorite place for fashionable musicales, and the headquarters of the musical profession."
Troels Svane (born 1967) is a Danish cellist.
 He is a part of the Zapolski Quartet.
 He studied with David Geringas at the Lübeck Academy of Music in Germany.
 He graduated from the soloist class with distinction and the highest grade in all subjects.
 He was taught by Anner Bylsma, Frans Helmerson, Ralph Kirshbaum, György Ligeti, Yo-Yo Ma, Siegfried Palm, Boris Pergamenschikow, Mstislav Rostropovich, Daniil Shafran, Paul Tortelier and the Amadeus Quartet.
Robert Parker {'1': ", '2': ", '3': ", '4': "} (9 January 1847 – 20 February 1937) was a New Zealand organist, choirmaster and conductor.
 He was born in London, England in 1847.
 He was appointed Companion of the Order of St Michael and St George in the 1930 New Year Honours as "a leading member of the musical profession in the Dominion of New Zealand".
Gervase Alfred Booth Hughes (1 September 1905 – July 1984) was an English composer, conductor and writer on music.
 From 1926 to 1933, Hughes pursued a career as a conductor and chorus master, principally at the British National Opera Company, and also co-produced Shakespeare plays.
 He left the musical profession in 1933, raising a family and working first as an executive in a railway company and later running luxury European tours.
 From 1960 to 1972 he published a series of books on musical subjects, beginning with a study of the music of Arthur Sullivan, published in 1960.
Tzofei Tel Aviv (or Tel Aviv Scouts in English) is a musical group originating from Israel.
 The performers are teenagers, picked out of the Israel Scouts in Tel-Aviv, Israel.
 They tour around the world, performing mostly Hebrew songs for Jewish organizations and others the world over.
 For example, they performed Yom Ha'atzmaut concerts in Lima and Guayaquil in June 2003, as they did in St. Louis Park, MN, in 2006.
 The group's musical director is Moishele Yosef, who has various other jobs in the musical profession.

Question: What was Troels Svane and Daniil Shafran musical profession?
Answer: cellist