Pie is related to Desert. Desert is related to Sun. Sun is related to Mass. Mass is related to Continent. 
Staff is related to Rod. Rod is related to Car. you are likely to find Door in/at/on Car. Door is related to Back. 
Pie <--RelatedTo--> Desert <--RelatedTo--> Sun <--RelatedTo--> Mass <--RelatedTo--> Continent 
Staff <--RelatedTo--> Rod <--RelatedTo--> Car <--AtLocation-- Door <--RelatedTo--> Back 