Live is related to Room. Surgery is a type of Room. Surgeon is derived from Surgery. 
Baseball is related to Base. Base is related to Guitar. Guitar can be used for Sound. Sound is related to Do. 
Live <--RelatedTo--> Room <--IsA-- Surgery <--DerivedFrom-- Surgeon 
Baseball <--RelatedTo--> Base <--RelatedTo--> Guitar --UsedFor--> Sound <--RelatedTo--> Do 