Question: The Genève-Servette HC competes in a league know by what name prior to the 2017-2018 season?
Sentence (from "Genève-Servette HC"): The Genève-Servette HC (also called "Servette" or "GSHC") is a professional ice hockey club based in Geneva, Switzerland and competing in the National League, the top tier of the Swiss hockey league system.
Relevant evidence: Yes