Little is related to Crowd. Crowd is related to Marketplace. Marketplace is a synonym of Market. you are likely to find Merchant in/at/on Market. 
Plain is a type of Land. Plain is related to Aircraft. 
Little <--RelatedTo--> Crowd <--RelatedTo--> Marketplace <--Synonym--> Market <--AtLocation-- Merchant 
Land <--IsA-- Plain <--RelatedTo--> Aircraft 