Sentence 1: On June 14 , Jackson served in a duel on behalf of his junior officer Jesse Benton as the second against William Carroll , the brother of Thomas .
Sentence 2: On June 14 , Jackson served as a second in a duel on behalf of his junior officer Jesse Benton against William Carroll , the brother of Thomas .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?