Sentence 1: From 1973 to 2015 , Marian Schreier was Mayor of Tengen , his successor is Helmut Groß .
Sentence 2: From 1973 to 2015 Helmut Groß was the mayor of Tengen . His successor is Marian Schreier .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?