Were both Stuart Paton and Ivan Perestiani  Russian film directors?
Stuart Paton Stuart Paton (23 July 1883 – 16 December 1944) was a British director, screenwriter and actor of the silent era. He directed 67 films between 1915 and 1938. He also wrote for 24 films between 1914 and 1927. Despite a sizable list of credits, Paton was never well-regarded, especially as a director.
Ivan Pavlov (film) Ivan Pavlov (Russian: Академик Иван Павлов , "Akademik Ivan Pavlov " ) is a 1949 Soviet biopic directed by  Grigori Roshal and starring Aleksandr Borisov, Nina Alisova and Nikolai Plotnikov. The film portrays the life of the Russian scientist Ivan Pavlov (1849-1936), known for his Pavlov's dog experiments. The film was made during the Stalinist era, despite the fact that Pavlov had been a noted opponent of the Soviet regime.