Guard is a type of Defender. Guard is related to Private. Private is the opposite of Major. 
you are likely to find Human in/at/on Country. Country is related to Category. Category is related to Art. Art is related to Painter. 
Defender <--IsA-- Guard <--RelatedTo--> Private <--Antonym--> Major 
Human --AtLocation--> Country <--RelatedTo--> Category <--RelatedTo--> Art <--RelatedTo--> Painter 