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Wiki information Grezov:
Boris Grezov or Boris Grezhov was a Bulgarian actor and film director. Grezov was one of the pioneers of early Bulgarian cinema, making important silent films such as Maiden's Rock and After the Fire Over Russia.
Maiden's Rock is a 1922 Bulgarian silent drama film directed by Boris Grezov and starring Grezov, Katya Syoyanova and Vyara Salplieva-Staneva.