Sentence 1: He taught physics at a number of universities in Germany , Italy , France , England , Lebanon , and Jordan before joining Birzeit University in 1980 .
Sentence 2: He taught physics at a number of universities in Germany , Italy , France , England , Lebanon , and Jordan , before switching to Birzeit University in 1980 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?