In which year was this Czech composer, musical theorist, folklorist, publicist and teacher born who composed "Concertino?"
Leoš Janáček Leoš Janáček (] , baptised Leo Eugen Janáček; 3 July 1854 – 12 August 1928) was a Czech composer, musical theorist, folklorist, publicist and teacher. He was inspired by Moravian and other Slavic folk music to create an original, modern musical style.
Józef Elsner Józef Antoni Franciszek Elsner (sometimes "Józef Ksawery Elsner"; baptismal name, "Joseph Anton Franz Elsner"; 1 June 176918 April 1854) was a composer, music teacher, and music theoretician, active mainly in Warsaw. He was one of the first composers in Poland to weave elements of folk music into his works.