you would Learn because Smart. Smart is a synonym of Sharp. 
Primary is etymologically related to Prime. Prime is related to Age. Age is related to Gray. Gray is related to Newspaper. 
Learn --MotivatedByGoal--> Smart <--Synonym--> Sharp 
Primary --EtymologicallyRelatedTo--> Prime <--RelatedTo--> Age <--RelatedTo--> Gray <--RelatedTo--> Newspaper 