Investigation is related to Police. Police is part of Government. Government is related to Reward. Reward is related to Thanks. 
you would Kill because Soldier. Soldier is a synonym of Dog. Person does not want (to) Dog. Ethnic is a type of Person. 
Investigation <--RelatedTo--> Police --PartOf--> Government <--RelatedTo--> Reward <--RelatedTo--> Thanks 
Kill --MotivatedByGoal--> Soldier <--Synonym--> Dog <--NotDesires-- Person <--IsA-- Ethnic 