In which sport will you find the IIHF World Championship Group A and IIHF World Championship Division I?
2017 IIHF World Championship Group A:  The four best placed teams advanced to the playoff round, while the last placed team was relegated to Division I in 2018. 2018 IIHF World Championship Division I: The 2018 IIHF World Championship Division I will be an international ice hockey tournament run by the International Ice Hockey Federation.
i don't know