Yakov Alexandrovich Protazanov (Russian: Я́ков Алекса́ндрович Протаза́нов ; January 23 (O.S. February 4), 1881 – August 8, 1945) was a Russian and Soviet film director and screenwriter, and one of the founding fathers of cinema of Russia. He was an Honored Artist of the Russian SFSR (1935) and Uzbek SSR (1944).
Yakov Alexandrovich Protazanov directed only silent films.
It's never explicitly mentioned what types of films he directed, so we don't know. It's difficult because it says Russian and Soviet film director, so perhaps the system was confused because this mentions two distinct types, and I used the word "only", but really neither of those are relevant to silent films or not.