Question: How many years has this professional league competition for football clubs been operating, in which Associazione Calcio CHievoVerona is currently competing?
Sentence (from "Serie A"): Serie A is ranked third among European leagues according to UEFA's league coefficient, behind La Liga, the Premier League and ahead of the Bundesliga and the Ligue 1, which is based on the performance of Italian clubs in the Champions League and the Europa League during the last five years.
Relevant evidence: No