Short is related to Be. Be is related to Existence. Existence is derived from Exist. Exist is a synonym of Survive. 
you would Learn because Stupid. Student wants (to) Learn. Literature can be used for Student. Literature can be used for Teaching. 
Short <--RelatedTo--> Be <--RelatedTo--> Existence --DerivedFrom--> Exist <--Synonym--> Survive 
Stupid <--MotivatedByGoal-- Learn <--Desires-- Student <--UsedFor-- Literature --UsedFor--> Teaching 