you are likely to find Gold in/at/on Tooth. Gold is related to Color. Color is related to Rice. 
Sharp is related to Cut. Cut is a synonym of Reduce. Reduce is related to Action. Interaction is a type of Action. 
Tooth <--AtLocation-- Gold <--RelatedTo--> Color <--RelatedTo--> Rice 
Sharp <--RelatedTo--> Cut <--Synonym--> Reduce <--RelatedTo--> Action <--IsA-- Interaction 