Line can be used for Definition. Line is a type of Cover. you are likely to find Cover in/at/on Garage. you are likely to find Shelf in/at/on Garage. 
Deputy is a different concept from Chief. Chief is related to Operating. 
Definition <--UsedFor-- Line --IsA--> Cover --AtLocation--> Garage <--AtLocation-- Shelf 
Deputy <--DistinctFrom--> Chief <--RelatedTo--> Operating 