Technician is a type of Professional. Technician is a type of Expert. Therapist is a type of Expert. Therapist can be used for Heal. 
Storage is related to Tank. Tank is related to Army. Army is related to Attack. Attack is related to Punch. 
Professional <--IsA-- Technician --IsA--> Expert <--IsA-- Therapist --UsedFor--> Heal 
Storage <--RelatedTo--> Tank <--RelatedTo--> Army <--RelatedTo--> Attack <--RelatedTo--> Punch 