Conversation so far:
what is the new olympic sport for 2018
For the 2018 Winter Olympic Games, Big air in snowboarding and freestyle skiing, mass start in speedskating and mixed doubles in curling were added to the program.
where was the 2018 winter olympics held
The 2018 Winter Olympics were held in Pyeongchang County, Gangwon Province, South Korea.

Question: how many nations participated in the games
Self-contained rewrite: how many nations participated in the 2018 winter olympics