Pizza is related to Cheese. Cheese is related to Melt. Melt is related to Heat. Heat is related to Property. 
Cake is related to Object. Object is related to Product. 
Pizza <--RelatedTo--> Cheese <--RelatedTo--> Melt <--RelatedTo--> Heat <--RelatedTo--> Property 
Cake <--RelatedTo--> Object <--RelatedTo--> Product 