notablePremiershipYears

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: notablePremiershipYears

Indicates the years during which an entity held a notable or distinguished premiership (term as prime minister or equivalent head of government).