Ghost is a type of Soul. Soul is related to Religion. Religion can cause/lead to War. War is related to Major. 
Fatigue is a type of Symptom. Chill is a type of Symptom. Chill is a synonym of Stone. 
Ghost --IsA--> Soul <--RelatedTo--> Religion --Causes--> War <--RelatedTo--> Major 
Fatigue --IsA--> Symptom <--IsA-- Chill <--Synonym--> Stone 