Letter is related to Paper. Paper is related to Contract. Contract is a synonym of Reduce. Reduce is a type of Separate. 
you would Eat because Hungry. you would Cook because Hungry. you would Cook because Create. 
Letter <--RelatedTo--> Paper <--RelatedTo--> Contract <--Synonym--> Reduce --IsA--> Separate 
Eat --MotivatedByGoal--> Hungry <--MotivatedByGoal-- Cook --MotivatedByGoal--> Create 