Reply is related to Put. Put is related to Action. Action is related to Effect. Effect is a synonym of Impression. 
Theory is created by Scientist. Scientist is a type of Worker. you are likely to find Worker in/at/on Work. you would Work because Useful. 
Reply <--RelatedTo--> Put <--RelatedTo--> Action <--RelatedTo--> Effect <--Synonym--> Impression 
Theory --CreatedBy--> Scientist --IsA--> Worker --AtLocation--> Work --MotivatedByGoal--> Useful 