Sentence 1: In 1956 , she worked with the orchestras of Boris Simeonov and Emil Georgiev for Big Orchestra Concert Directorate conductors , who were Christo Vuchkov and Dimitar Ganev .
Sentence 2: In 1956 , she worked with the orchestras of Boris Simeonov and Emil Georgiev for Big Orchestra Concert Directorate conductors of which were Christo Vuchkov and Dimitar Ganev .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?