you are likely to find Dirt in/at/on Desk. Dirt is related to Grave. Grave is related to Ground. Ground is a synonym of Terrain. 
Enjoy is related to Have. Have is related to Necessary. Sleep can be Necessary. Sleep is related to Tired. 
Desk <--AtLocation-- Dirt <--RelatedTo--> Grave <--RelatedTo--> Ground <--Synonym--> Terrain 
Enjoy <--RelatedTo--> Have <--RelatedTo--> Necessary <--HasProperty-- Sleep <--RelatedTo--> Tired 