Dog wants (to) Dig. Dog is related to Home. you are likely to find Vessel in/at/on Home. Vessel is related to Glass. 
Box is related to Paper. you are likely to find Paper in/at/on Classroom. 
Dig <--Desires-- Dog <--RelatedTo--> Home <--AtLocation-- Vessel <--RelatedTo--> Glass 
Box <--RelatedTo--> Paper --AtLocation--> Classroom 