Sentence 1: This version of Robert Hammond is a xenobiologist - professor , an old friend of Hal Jordan and the son of Senator of the United States Hector Hammond .
Sentence 2: This version of Robert Hammond is a xenobiology professor , an old friend of Hal Jordan and the son of United States senator Hector Hammond .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?