Question: Us Conductors accounts the relationship between  Clara Rockmore and this inventor who is most famous for his invention of what?
Sentence (from "Léon Theremin"): Lev Sergeyevich Termen (Russian: Лев Сергеевич Термен ) (27 August [O.S. 15 August] 1896 – 3 November 1993), or Léon Theremin in the United States, was a Russian and Soviet inventor, most famous for his invention of the theremin, one of the first electronic musical instruments and the first to be mass-produced.
Relevant evidence: Yes