Foot is a type of Support. you are likely to find Toe in/at/on Foot. Toe is related to Short. Shorts is a form of Short. 
Placement is a type of Position. Position is related to Floor. you are likely to find Floor in/at/on Store. 
Support <--IsA-- Foot <--AtLocation-- Toe <--RelatedTo--> Short <--FormOf-- Shorts 
Placement --IsA--> Position <--RelatedTo--> Floor --AtLocation--> Store 