ALCSOpponentOfChampion

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: ALCSOpponentOfChampion

Indicates that a team was the opponent faced by the eventual champion in the American League Championship Series (ALCS).