Tea is related to British. British is related to Colony. Colony is related to Town. Town is related to District. 
Lesson is related to Session. Session is related to Case. Case is related to Furniture. Furniture is related to Toilet. 
Tea <--RelatedTo--> British <--RelatedTo--> Colony <--RelatedTo--> Town <--RelatedTo--> District 
Lesson <--RelatedTo--> Session <--RelatedTo--> Case <--RelatedTo--> Furniture <--RelatedTo--> Toilet 