Question: The Symphony No. 6 in B minor was first performed in Moscow on 4/16 December, conducted by  Russian pianist, teacher, conductor and composer also known as who?
Sentence (from "Overture in the French style, BWV 831"): Thus this sequence of customary tonalities for 18th-century keyboard compositions is complete, extending from the first letter of his name (Bach's "home" key, B♭ , in German is B) to the last letter of his name (B♮ in German is H).
Relevant evidence: No