Complex sentence: A veterinarian, Andrew Oster, from Midland, Ontario was the show's biggest winner garnering $300,000 (CDN), tax-free; his prize was the highest sum in Canadian game-show history.
Split into simpler sentences: A veterinarian, Andrew Oster, from Midland, Ontario was the show's biggest winner garnering $300,000 tax-free Canadian dollars. His prize was the highest sum in Canadian game-show history.