Question: Information:  - Nikolai Yakovlevich Myaskovsky or Miaskovsky or Miaskowsky ( 8 August 1950) was a Russian and Soviet composer. He is sometimes referred to as the "Father of the Soviet Symphony". Myaskovsky was awarded the Stalin Prize five times, more than any other composer.  - Nikolai Myaskovsky composed his Cello Concerto in C minor , Op. 66 , during the years 1944 -- 45 . It ranks among the few works of the composer that is to be found most frequently in concert or on recordings . The concerto is in two movements : Lento ma non troppo -- Andante -- Tempo I Allegro vivace -- Piu marcato -- Meno mosso -- Tempo I The total duration of the concerto amounts to about 25 minutes . The piece is among the late works of the composer , and among its melodies appear Russian folk songs . The concerto was written for Sviatoslav Knushevitsky , one of Myaskovsky 's great champions , who premiered it in Moscow on 17 March 1945 . The first recording , however , was made by Mstislav Rostropovich in 1956 .  - Russia (from the  Rus'), also officially known as the Russian Federation, is a country in Eurasia. At , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 140 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern, about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world, other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod and Samara.  - A symphony is an extended musical composition in Western classical music, most often written by composers for orchestra. Although the term has had many meanings from its origins in the ancient Greek era, by the late 18th century the word had taken on the meaning common today: a work usually consisting of multiple distinct sections or movements, often four, with the first movement in sonata form. Symphonies are scored for string (violin, viola, cello and double bass), brass, woodwind, and percussion instruments which altogether number about 30100 musicians. Symphonies are notated in a musical score, which contains all the instrument parts. Orchestral musicians play from parts which contain just the notated music for their instrument. A small number of symphonies also contain vocal parts (e.g., Beethoven's Ninth Symphony).  - A composer (Latin "compn"; literally "one who puts together") is a person who creates or writes music, which can be vocal music (for a singer or choir), instrumental music (e.g., for solo piano, string quartet, wind quintet or orchestra) or music which combines both instruments and voices (e.g., opera or art song, which is a singer accompanied by a pianist). The core meaning of the term refers to individuals who have contributed to the tradition of Western classical music through creation of works expressed in written musical notation (e.g., sheet music scores).    After reading the paragraphs above, we are interested in knowing the entity with which 'cello concerto ' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - area  - art  - august  - cello  - century  - choir  - federation  - instrument  - march  - music  - musical  - musical composition  - number  - part  - people  - person  - play  - population  - quartet  - soviet  - string  - string quartet  - symphony  - term  - wind

Answer: musical composition