Question: How many years has this professional league competition for football clubs been operating, in which Associazione Calcio CHievoVerona is currently competing?
Sentence (from "2011–12 A.C. ChievoVerona season"): Associazione Calcio ChievoVerona (more commonly called ChievoVerona or simply Chievo) is currently competing in its 4th consecutive season in the Serie A.
Relevant evidence: Yes