Question: The 2017 Supersport 300 World Championship is the first season of the Supersport 300 World Championship, the debut season is being contested over nine races, which are held at all the European rounds of which 30th season of the Superbike World Championship?
Sentence (from "2017 Superbike World Championship"): The 2017 Superbike World Championship is the 30th season of the Superbike World Championship.
Relevant evidence: Yes