Complex sentence: Eduard Frantsovitch Nápravník (24 August 1839, Býšť, Bohemia-23 November 1916) was a Czech conductor and composer, best known for his leading role in Russian musical life as the principal conductor of Sankt Petersburg for over fifty years.
Split into simpler sentences: Eduard Frantsovitch Nápravník (24 August 1839, Býšť, Bohemia-23 November 1916) was Czech/Russian conductor and composer. He is best known for his leading role in Russian musical life as the principal conductor of Sankt Petersburg for over fifty years.