Ass is a type of Fool. Fool is a different concept from Smart. Smart is related to Human. 
you are likely to find Homeless in/at/on Bridge. Bridge is related to Man. Man is related to Chest. 
Ass --IsA--> Fool <--DistinctFrom--> Smart <--RelatedTo--> Human 
Homeless --AtLocation--> Bridge <--RelatedTo--> Man <--RelatedTo--> Chest 