Original: In 1932, Bulgakov married for the third time, to Yelena Shilovskaya, who would prove to be inspiration for the character Margarita in his most famous novel.
Simplified: In 1931, Bulgakov got married again, to Yelena Shilovskaya. Yelena inspired one of the main characters in Bulgakov's most famous novel, The Master and Margarita.