Powder is related to Dry. Dry is similar to Plain. Plain is the opposite of Exotic. 
Liberty is a type of Rocket. Rocket is related to Ship. you are likely to find Person in/at/on Ship. Ethnic is a type of Person. 
Powder <--RelatedTo--> Dry <--SimilarTo--> Plain <--Antonym--> Exotic 
Liberty --IsA--> Rocket <--RelatedTo--> Ship <--AtLocation-- Person <--IsA-- Ethnic 