Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Problem:Bill Paxton Death Certificate Valve Replacement Surgery Triggered Stroke 
  
 Bill Paxton Death Certificate, Value Replacement Surgery Triggered Stroke 
  
 EXCLUSIVE 
  
 Bill Paxton's death was triggered by an aneurysm that required surgery which resulted in a fatal stroke. 
  
 According to the death certificate, obtained by TMZ, Paxton had just undergone valve replacement surgery to correct the aortic aneurysm problem when complications arose later and he suffered a stroke. 
  
 According to the death certificate, Bill had the surgery on February 14th and died on the 25th. 
  
 TMZ broke the story, the 61-year-old actor died February 25 at Cedars-Sinai Medical Center in L.A. ||||| Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period. |||||
Solution:
It's been just over a week since the world found out about the sudden death of actor Bill Paxton at the age of 61, and now there's reportedly more info on what happened. Per an apparent copy of Paxton's death certificate now in the hands of TMZ, the Titanic star was killed by a stroke on Feb. 25 that arose from complications after a Feb. 14 valve replacement surgery to remedy an aortic aneurysm he'd had. He's listed as having passed away at Cedars-Sinai Medical Center in Los Angeles. (Storm chasers have been paying their respects to Paxton, who also starred in Twister.)