Sentence 1: In the original IBM - PC , an NMI was detected when a parity error in the system memory was reported or triggered by an external device .
Sentence 2: In the original IBM - PC , an NMI was triggered when a parity error in the system 's memory was detected or reported by an external device .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?