Ear is related to Cell. Cell is related to Round. Round is a type of Gain. 
Cloth is related to Sheet. Blank is a type of Sheet. Blink is etymologically related to Blank. 
Ear <--RelatedTo--> Cell <--RelatedTo--> Round --IsA--> Gain 
Cloth <--RelatedTo--> Sheet <--IsA-- Blank <--EtymologicallyRelatedTo-- Blink 