Class is related to Lady. Lady is related to Luck. Luck is related to Irish. 
you are likely to find Pen in/at/on Shop. Pen is related to Tool. you are likely to find Tool in/at/on Garage. 
Class <--RelatedTo--> Lady <--RelatedTo--> Luck <--RelatedTo--> Irish 
Shop <--AtLocation-- Pen <--RelatedTo--> Tool --AtLocation--> Garage 