King is related to Popular. Popular is related to Demand. Demand is related to Obligation. 
Clothing is related to Department. Department is related to Unit. Unit is related to Price. Price is related to Purchase. 
King <--RelatedTo--> Popular <--RelatedTo--> Demand <--RelatedTo--> Obligation 
Clothing <--RelatedTo--> Department <--RelatedTo--> Unit <--RelatedTo--> Price <--RelatedTo--> Purchase 