Question: Why is the ethnomusicologist, Bela Viktor Janos Bartok's Piano Concerto No. 2 in G major considered notorious?
Sentence (from "Piano Concerto No. 2 (Bartók)"): 95, BB 101 (1930–31) is the second of three piano concerti, and is notorious for being one of the most difficult pieces in the repertoire.
Relevant evidence: Yes