seasonYears

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: seasonYears

Indicates the span of calendar years during which a particular season (e.g., of a show, competition, or activity) takes place or is valid.