Sale is related to Half. Half is related to Divide. Format is a type of Divide. 
Tired is related to Stretch. Stretch is related to Warm. Warm is related to Steam. 
Sale <--RelatedTo--> Half <--RelatedTo--> Divide <--IsA-- Format 
Tired <--RelatedTo--> Stretch <--RelatedTo--> Warm <--RelatedTo--> Steam 