Topic is related to Store. Store is related to Case. Case is related to Holiday. Anniversary is a type of Holiday. 
Bag is related to School. School is related to Desk. you are likely to find Dog in/at/on Desk. 
Topic <--RelatedTo--> Store <--RelatedTo--> Case <--RelatedTo--> Holiday <--IsA-- Anniversary 
Bag <--RelatedTo--> School <--RelatedTo--> Desk <--AtLocation-- Dog 