パ・リーグ優勝年

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: パ・リーグ優勝年

Indicates the year in which a team won the Pacific League (パ・リーグ) championship.