Purse is a type of Round. Purse is related to Lady. Lady can be used for Sex. Sex is related to Man. 
Decade is related to Calendar. you are likely to find Calendar in/at/on Desk. Desk is related to Return. Return is a type of Run. 
Round <--IsA-- Purse <--RelatedTo--> Lady --UsedFor--> Sex <--RelatedTo--> Man 
Decade <--RelatedTo--> Calendar --AtLocation--> Desk <--RelatedTo--> Return --IsA--> Run 