Senior is etymologically related to Senate. you are likely to find Senior in/at/on School. School is related to Primary. Primary is related to Main. 
Product is derived from Produce. Product is related to Smoke. Smoke is related to Factory. 
Senate <--EtymologicallyRelatedTo-- Senior --AtLocation--> School <--RelatedTo--> Primary <--RelatedTo--> Main 
Produce <--DerivedFrom-- Product <--RelatedTo--> Smoke <--RelatedTo--> Factory 