Sentence 1: When Lombardo switched to NBC , Burns and Allen took over his CBS spot with `` The Adventures of Gracie '' from 19 September 1934 .
Sentence 2: When Lombardo switched to CBS , Burns and Allen took over his NBC spot with `` The Adventures of Gracie '' at the beginning of September 1934 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?