Question: Sergei Prokofiev's Symphony-Concerto in E minor, Op. 125 sometimes was referred to as what?
Context: Sergei Prokofiev set to work on his Piano Concerto No. 2 in G minor, Op. 16, in 1912 and completed it in 1913.  But this concerto is lost; the score was destroyed in a fire following the Russian Revolution.  Prokofiev reconstructed the work in 1923, two years after finishing his Third Concerto, and declared it to be “so completely rewritten that it might almost be considered [Concerto] No. 4”; indeed its orchestration has features that clearly postdate the 1921 concerto.  Performing as solo pianist, Prokofiev premiered this surviving “No. 2” in Paris on 8 May 1924 with Serge Koussevitzky conducting.  It is dedicated to the memory of Maximilian Schmidthof, a friend of Prokofiev's at the St. Petersburg Conservatory who had killed himself in 1913. Sergei Prokofiev's Violin Sonata No. 2 in D Major, Op. 94a (sometimes written as Op. 94bis), was based on the composer's own Flute Sonata in D, Op. 94, written in 1942 but arranged for violin in 1943 when Prokofiev was living in Perm in the Ural Mountains, a remote shelter for Soviet artists during the Second World War.  Prokofiev transformed the work into a violin sonata at the prompting of his close friend violinist David Oistrakh.  It was premiered on 17 June 1944 by David Oistrakh and Lev Oborin. Sergei Sergeyevich Prokofiev ( ; Russian: Сергей Сергеевич Прокофьев , "Sergej Sergejevič Prokofjev" ; 27 April 1891 – 5 March 1953) was a Soviet composer, pianist and conductor.  As the creator of acknowledged masterpieces across numerous musical genres, he is regarded as one of the major composers of the 20th century.  His works include such widely heard works as the March from "The Love for Three Oranges," the suite "Lieutenant Kijé", the ballet "Romeo and Juliet" – from which "Dance of the Knights" is taken – and "Peter and the Wolf."  Of the established forms and genres in which he worked, he created – excluding juvenilia – seven completed operas, seven symphonies, eight ballets, five piano concertos, two violin concertos, a cello concerto, a Symphony-Concerto for cello and orchestra, and nine completed piano sonatas. Semyon Kotko (Russian: Семён Котко ), Op. 81, is an opera in five acts by Sergei Prokofiev to a libretto by Sergei Prokofiev and Valentin Katayev based on Katayev's 1937 novel "I, Son of Working People" (Russian: Я, сын трудового народа… ).  It was premiered on 23 June 1940 at the Stanislavsky Opera Theatre in Moscow. The String Quartet in E minor, Op. 83, was one of three major chamber music works composed by Sir Edward Elgar in 1918.  The others were the Violin Sonata in E minor, Op. 82, and the Piano Quintet in A minor, Op. 84.  Along with the Cello Concerto in E minor, Op. 85 of 1919, these were to be his last major works prior to his death in 1934. Sir Edward Elgar wrote his Violin Sonata in E minor, Op. 82, in 1918, at the same time as he wrote his String Quartet in E minor and his Piano Quintet in A minor.  These three chamber music works were all written at "Brinkwells", the country house near Fittleworth in West Sussex that Lady Elgar had acquired for her husband to recuperate and compose in, and they mark his major contribution to the chamber music genre.  His Cello Concerto in E minor of 1919 completed the quartet of introspective and melancholy works that comprised Elgar's last major creative spurt before his death in 1934. Sergei Prokofiev's Piano Sonata No. 10 in E minor, Op. 137 (1952) (unfinished) is a sonata composed for solo piano. Sergei Prokofiev's Symphony-Concerto in E minor, Op. 125 (sometimes referred to as Sinfonia Concertante) is a large-scale work for cello and orchestra.  Prokofiev dedicated it to Mstislav Rostropovich, who premiered it on February 18, 1952 with Sviatoslav Richter conducting (the only instance of Richter conducting).  After this first performance (under the title 'Cello Concerto No. 2'), it was revised and given its current title.  It is itself a revised version of his earlier Cello Concerto, Op.  58, written in 1933–8. Visions fugitives, Op. 22, are a series of short piano pieces composed by Russian composer Sergei Prokofiev (1891–1953) between 1915 and 1917.  They were premiered by Prokofiev on April 15, 1918 in Petrograd, Soviet Union.  They were written individually, many for specific friends of Prokofiev's, and he originally referred to them as his "doggies" because of their "bite".  In August 1917, Prokofiev played them for Russian poet Konstantin Balmont, and others, at the home of a mutual friend.  Balmont was inspired to compose a sonnet on the spot, called "a magnificent improvisation" by Prokofiev who named the pieces ""Mimolyotnosti"" from these lines in Balmont's poem: ""In every fleeting vision I see worlds, Filled with the fickle play of rainbows"".  A French-speaking friend at the house, Kira Nikolayevna, immediately provided a French translation for the pieces: "Visions Fugitives".  Prokofiev often performed only a couple of them at a time as encores at the end of his performances. Symphony No. 4, Op. 47/112 is actually two works by Sergei Prokofiev.  The first, Op. 47, was written in 1929 and premiered in 1930; it lasts about 22 minutes.  The second, Op. 112, is a large-scale revision from 1947; it lasts about 37 minutes.  Both use musical material originally written for Prokofiev's ballet "The Prodigal Son".  The two works are stylistically different, reflecting their respective compositional contexts.  They are formally different too: the instrumentation and scope of the revision is larger.
Answer: Sinfonia Concertante