Sharp is related to Twist. Twist is a synonym of Device. Device is related to Lens. 
Head is a synonym of Steer. Steer is similar to Bull. Bull is a type of Person. Person wants (to) Stable. 
Sharp <--RelatedTo--> Twist <--Synonym--> Device <--RelatedTo--> Lens 
Head <--Synonym--> Steer <--SimilarTo--> Bull --IsA--> Person --Desires--> Stable 