Question: What society of musicians was founded by Mitrofan Belayev and included Russian composer Natoly Lyadov?
Sentence (from "Anatoly Lyadov"): Anatoly Konstantinovich Lyadov or Liadov (Russian: Анато́лий Константи́нович Ля́дов ; May 12 [O.S. April 30] 1855 August 28 [O.S. August 15] 1914 ) was a Russian composer, teacher and conductor.
Relevant evidence: Yes