Knife can be used for Opening. Knife can be used for Fighting. Fighting is related to Army. 
Captain is a synonym of Supervisor. Counselor is a type of Supervisor. Counselor is a synonym of Lawyer. Lawyer is related to Practitioner. 
Opening <--UsedFor-- Knife --UsedFor--> Fighting <--RelatedTo--> Army 
Captain <--Synonym--> Supervisor <--IsA-- Counselor <--Synonym--> Lawyer <--RelatedTo--> Practitioner 