Conversation so far:
where will the 2018 olympics be held
The 2018 Winter Olympics were held in PyeongChang in South Korea.
how many athletes participated in the 2018 winter olympics
2,922 Athletes participated in the 2018 Winter Olympics
did north korea participate in the 2018 winter olympics
North Korea competed in the 2018 Winter Olympics in Pyeongchang, South Korea.
how many north korean athletes competed at the 2018 winter olympics
There were 10 North Korean competitors at the 2018 Winter Olympics

Question: why did the pair skaters not compete
Self-contained rewrite: why did the north korean pair skaters not compete at the 2018 winter olympics