you are likely to find Backyard in/at/on Country. you are likely to find Wagon in/at/on Backyard. Wagon is etymologically related to Weigh. Weight is derived from Weigh. 
Questionnaire is etymologically related to Question. Question is related to Unique. 
Country <--AtLocation-- Backyard <--AtLocation-- Wagon --EtymologicallyRelatedTo--> Weigh <--DerivedFrom-- Weight 
Questionnaire --EtymologicallyRelatedTo--> Question <--RelatedTo--> Unique 