Complex sentence: A one-time prominent Moscow Art Theatre actress Margarita Savitskaya was his wife, the film and theatre director Arkady Burdzhalyan (1879-1946) was his brother.
Split into simpler sentences: A one-time prominent Moscow Art Theatre actress Margarita Savitskaya was his wife. The film and theatre director Arkady Burdzhalyan (1879-1946) was his brother.