Sentence 1: In 1903 , copper was dismantled by the Nevada Consolidated Copper Company and the Giroux Consolidated Mining Company in 1904 .
Sentence 2: Starting in 1903 , copper was mined by the Giroux Consolidated Mining Company and by the Nevada Consolidated Copper Company in 1904 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?