an Entity references as follows:
Serge Alexandrovich Koussevitzky (Russian: Серге́й Алекса́ндрович Кусеви́цкий; Sergey Aleksandrovich Kusevitsky; July 26 [O.S. July 14] 1874 – June 4, 1951) was a Russian-born conductor, composer and double-bassist, known for his long tenure as music director of the Boston Symphony Orchestra from 1924 to 1949.