Communication is related to Send. Send is related to Letter. Letter is a type of Print. Print is related to Outlet. 
you would Kill because Soldier. Kill is a type of Exhaust. Exhaust is a synonym of Weaken. 
Communication <--RelatedTo--> Send <--RelatedTo--> Letter --IsA--> Print <--RelatedTo--> Outlet 
Soldier <--MotivatedByGoal-- Kill --IsA--> Exhaust <--Synonym--> Weaken 