Curve is related to Bend. Bend is a synonym of Fold. Machine can be used for Fold. Machine is related to Operator. 
Dear is related to Hunting. Hunting is related to Shoot. Shoot is a synonym of Book. Legend is a type of Book. 
Curve <--RelatedTo--> Bend <--Synonym--> Fold <--UsedFor-- Machine <--RelatedTo--> Operator 
Dear <--RelatedTo--> Hunting <--RelatedTo--> Shoot <--Synonym--> Book <--IsA-- Legend 