Sentence 1: Rail transport in Belgium was historically managed by the National Railway Company of Belgium , known as NMBS in French and SNCB in Dutch .
Sentence 2: Rail transport in Belgium was historically managed by the National Railway Company of Belgium , which was known in French as the NMBS and in Dutch as the SNCB .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?