Sentence 1: Jagath died on 11 April , 1981 from a heart attack shortly after his son Santha drowned under mysterious circumstances in a swimming pool .
Sentence 2: Shortly after his son , Jagath , drowned in a swimming pool under mysterious circumstances , he died of a heart attack on April 11 , 1981 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?