Hurt is related to Aid. Aid is related to Assistance. 
Body is related to Swim. Swim is related to Person. Player is a type of Person. Pitcher is a type of Player. 
Hurt <--RelatedTo--> Aid <--RelatedTo--> Assistance 
Body <--RelatedTo--> Swim <--RelatedTo--> Person <--IsA-- Player <--IsA-- Pitcher 