Sentence 1: The alkaline volcanic field consists of a group of 118 basaltic volcanoes active from the lower-Pleistocene to the Holocene .
Sentence 2: The alkaline volcanic field consists of a group of 118 basaltic volcanoes active from the lower pleistocene to the Holocene .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?