Helicopter can be used for Travel. you are likely to find Helicopter in/at/on Airport. Airport is related to Plane. you are likely to find Fork in/at/on Plane. 
you would Contemplate because Wonder. one thing you do when you Contemplate is Headache. 
Travel <--UsedFor-- Helicopter --AtLocation--> Airport <--RelatedTo--> Plane <--AtLocation-- Fork 
Wonder <--MotivatedByGoal-- Contemplate --HasSubevent--> Headache 