I would like more information on William Grut, Swedish pentathlete.?

Question

He won a silver medal Winter Pentathlon at the 1948 Winter Olympics in St. Moritz, it was a demonstration sport and a gold medal Modern Pentathlon in the1948 Olympics in London.

What I would like to know is why isn't he recognised along side the other four athletes who have won medals in both Winter and Summer Olympics.

I have tried the sports section. Olympics but no such luck

Answer 1

www.wikipedia.com/william grut