Copy is related to Computer. you are likely to find Computer in/at/on Table. you are likely to find Table in/at/on Conference. Seminar is a type of Conference. 
Force is related to Break. Ladder is a type of Break. 
Copy <--RelatedTo--> Computer --AtLocation--> Table --AtLocation--> Conference <--IsA-- Seminar 
Force <--RelatedTo--> Break <--IsA-- Ladder 