Question: What was the middle name of the pianist who first performed Prokofiev's Piano Sonata No. 8?
Sentence (from "Piano Sonata No. 8 (Prokofiev)"): Sergei Prokofiev's Piano Sonata No. 8 in B♭ major, Op. 84 (1944) is a sonata for solo piano, the third of the Three War Sonatas.
Relevant evidence: No