Sentence 1: William Pendry Bidelman ( ; September 25 , 1918 -- May 3 , 2011 ) whose friends called him `` Billy '' , was an American astronomer .
Sentence 2: William Pendry Bidelman ( September 25 , 1918 - May 3 , 2011 ) , whose friends called him “ Billy , ” was an American astronomer .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?