Cream is a type of Elite. Cream is related to Milk. Milk is related to Feed. 
Complexity is derived from Complex. Complexity is a type of Difficulty. Difficulty is related to Level. Level is related to Balanced. 
Elite <--IsA-- Cream <--RelatedTo--> Milk <--RelatedTo--> Feed 
Complex <--DerivedFrom-- Complexity --IsA--> Difficulty <--RelatedTo--> Level <--RelatedTo--> Balanced 