Singer is related to Person. Iraqi is a type of Person. 
Anger is etymologically related to Anxious. Anger is related to Fight. Shock is a type of Fight. Shock is related to Reaction. 
Singer <--RelatedTo--> Person <--IsA-- Iraqi 
Anxious <--EtymologicallyRelatedTo-- Anger <--RelatedTo--> Fight <--IsA-- Shock <--RelatedTo--> Reaction 