Meeting is a type of Assembly. you are likely to find Boss in/at/on Meeting. Boss is the opposite of Servant. Servant is related to Personal. 
Leave is related to Door. Door is related to Area. Area is related to Back. Quarterback is a type of Back. 
Assembly <--IsA-- Meeting <--AtLocation-- Boss <--Antonym--> Servant <--RelatedTo--> Personal 
Leave <--RelatedTo--> Door <--RelatedTo--> Area <--RelatedTo--> Back <--IsA-- Quarterback 