Sentence 1: Chimpanzees often eat the marrow of small bones of colobus monkeys with the help of long sticks , after opening the ends of the bones with their teeth .
Sentence 2: Chimpanzees often eat the mark of small bones of colobus monkeys with the help of long sticks after having opened the ends of the bones with their teeth .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?