Happiness is derived from Happy. Happy is similar to Willing. 
Moon is a type of Object. Neighbor is a type of Object. Neighbor is related to Grass. Grass is related to Edge. 
Happiness --DerivedFrom--> Happy <--SimilarTo--> Willing 
Moon --IsA--> Object <--IsA-- Neighbor <--RelatedTo--> Grass <--RelatedTo--> Edge 