Plate is typically near Food. you are likely to find Bone in/at/on Food. Skull is a type of Bone. 
Physical is a different concept from Spiritual. Spiritual is related to Angel. 
Plate <--LocatedNear--> Food <--AtLocation-- Bone <--IsA-- Skull 
Physical <--DistinctFrom--> Spiritual <--RelatedTo--> Angel 