Sentence 1: Dion expanded his previous arguments against the territorial integrity of Quebec after the secession by highlighting inconsistency in the argument that Canada is divisible , but Quebec is not .
Sentence 2: Dion expanded upon his earlier arguments against the territorial integrity of Quebec following secession by highlighting the inconsistency in the argument that Quebec is divisible but Canada is not .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?