Operation is a type of Activity. Works is a type of Activity. Works is related to Art. Art can be Philosophical. 
Side is related to Shape. Shape is related to Health. Health is a different concept from Ill. 
Operation --IsA--> Activity <--IsA-- Works <--RelatedTo--> Art --HasProperty--> Philosophical 
Side <--RelatedTo--> Shape <--RelatedTo--> Health <--DistinctFrom--> Ill 