Complex sentence: Each of the continental champions from five confederations and the host nation received an automatic berth, and the 10/11 highest placed teams at the Semifinals of the 2016--17 FIH Hockey World League not already qualified would enter the tournament.
Split into simpler sentences: Each of the continental champions from five confederations and the host nation received an automatic berth. In addition, the 10/11 highest placed teams at the Semifinals of the 2016--17 FIH Hockey World League not already qualified will enter the tournament.