Sentence 1: Ratcliffe 's son was the scientist Francis Ratcliffe , and one of his two daughters married the neurophysiologist W. Grey Walter . Nicholas Walter was his grandson .
Sentence 2: The son of Ratcliffe married the scientist W. Grey Walter , and one of his two daughters was neurophysiologist Nicholas Walter , Francis Ratcliffe was his grandson .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?