Part is a type of Thing. Part is related to Car. you are likely to find Mirror in/at/on Car. you are likely to find Mirror in/at/on Bedroom. 
Chill is a type of Symptom. Symptom is a type of Evidence. Clue is a type of Evidence. 
Thing <--IsA-- Part <--RelatedTo--> Car <--AtLocation-- Mirror --AtLocation--> Bedroom 
Chill --IsA--> Symptom --IsA--> Evidence <--IsA-- Clue 