Acknowledge is a type of Communicate. Acknowledge is a synonym of Admit. Apologize entails/necessarily involves Admit. 
Character is related to Main. Main is related to Downtown. Downtown is related to Business. 
Communicate <--IsA-- Acknowledge <--Synonym--> Admit <--Entails-- Apologize 
Character <--RelatedTo--> Main <--RelatedTo--> Downtown <--RelatedTo--> Business 