Emergency is a type of Crisis. Emergency is related to Bad. Bad is the opposite of Premium. 
Wage is related to Income. Return is a type of Income. Return is a synonym of Reply. Reply is related to Call. 
Crisis <--IsA-- Emergency <--RelatedTo--> Bad <--Antonym--> Premium 
Wage <--RelatedTo--> Income <--IsA-- Return <--Synonym--> Reply <--RelatedTo--> Call 