Think requires Learn. you would Think because Remember. one thing you do when you Remember is Revelation. 
Medal is related to Metal. Lock is made of Metal. Lock can be used for Privacy. Curtain can be used for Privacy. 
Learn <--HasPrerequisite-- Think --MotivatedByGoal--> Remember --HasSubevent--> Revelation 
Medal <--RelatedTo--> Metal <--MadeOf-- Lock --UsedFor--> Privacy <--UsedFor-- Curtain 