Were both Stuart Paton and Ivan Perestiani  Russian film directors?
Ivan Perestiani Ivan Nikolaevich Perestiani (also Ivane, Georgian: ივანე პერესტიანი ; Russian: Иван Николаевич Перестиани ; 13 April [O.S. 1 April] 1870 — 14 May 1959) was a Russian/Soviet film director, script-writer and actor, and People's Artist of the Georgian SSR (1949). He was of Kefalonian Greek descent.
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.