Grandfather is a type of Grandparent. Grandfather is related to Man. Man is related to Hand. Hand is related to People. 
you are likely to find Basketball in/at/on Closet. you are likely to find Light in/at/on Closet. Light is related to Blue. Blue is a type of Color. 
Grandparent <--IsA-- Grandfather <--RelatedTo--> Man <--RelatedTo--> Hand <--RelatedTo--> People 
Basketball --AtLocation--> Closet <--AtLocation-- Light <--RelatedTo--> Blue --IsA--> Color 