<prompt> Pedzisa mutsara unotevera: Vivian Berkeley akaberekwa musi waAugust 9, 1941 muCanada kaviri World Blind Lawn Bowling Champion,  <response>: 1996 Paralympic Games Silver Medalist uye 2002 Commonwealth Games Bronze Medalist. Pasina mubvunzo Greatest Canadian Blind Lawn Bowler of All-time B1 category completely blind, Berkeley ariwo zvikuru arguably the Most Successful International lawn bowler in Canadian history. 