actsAsPresidentWhen

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: actsAsPresidentWhen

Indicates that one entity performs the duties or functions of president on behalf of or in place of another entity, typically during a specific period or under certain conditions.