Leave is related to Door. Door is related to Area. Area is related to Back. Quarterback is a type of Back. 
Acknowledge is a synonym of Notice. Notice is a synonym of Glimpse. 
Leave <--RelatedTo--> Door <--RelatedTo--> Area <--RelatedTo--> Back <--IsA-- Quarterback 
Acknowledge <--Synonym--> Notice <--Synonym--> Glimpse 