Workshop is a synonym of Shop. Shop is a synonym of Garage. you are likely to find Refrigerator in/at/on Garage. you are likely to find Refrigerator in/at/on House. 
Reward is related to Interest. 
Workshop <--Synonym--> Shop <--Synonym--> Garage <--AtLocation-- Refrigerator --AtLocation--> House 
Reward <--RelatedTo--> Interest 