Question: What was the nationality of the student of Jan Baudouin de Courtenay and member of the Kazan School? 
Sentence (from "Jan Baudouin de Courtenay"): Jan Niecisław Ignacy Baudouin de Courtenay (13 March 1845 – 3 November 1929) was a Polish linguist and Slavist, best known for his theory of the phoneme and phonetic alternations.
Relevant evidence: No