Government is related to Organization. Organization is related to Meeting. Meeting is related to Office. Office is related to Inside. 
Medicine is related to Science. Psychology is a type of Science. Psychology is related to Aggression. 
Government <--RelatedTo--> Organization <--RelatedTo--> Meeting <--RelatedTo--> Office <--RelatedTo--> Inside 
Medicine <--RelatedTo--> Science <--IsA-- Psychology <--RelatedTo--> Aggression 