Retailer is derived from Retail. Retailer is related to Seller. Seller is related to Buyer. Buyer is related to Customer. 
Chip is related to Potato. you are likely to find Potato in/at/on Crop. Crop is related to Commodity. Import is a type of Commodity. 
Retail <--DerivedFrom-- Retailer <--RelatedTo--> Seller <--RelatedTo--> Buyer <--RelatedTo--> Customer 
Chip <--RelatedTo--> Potato --AtLocation--> Crop <--RelatedTo--> Commodity <--IsA-- Import 