mainstreamSupportEndDate

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: mainstreamSupportEndDate

Indicates the date on which mainstream or primary support for something (such as a product, service, or policy) ends.