Body is related to Continent. Continent is related to Area. Center is a type of Area. 
Conventional is similar to Straight. Straight is similar to Correct. Correct is related to Eye. Eye is related to Organism. 
Body <--RelatedTo--> Continent <--RelatedTo--> Area <--IsA-- Center 
Conventional <--SimilarTo--> Straight <--SimilarTo--> Correct <--RelatedTo--> Eye <--RelatedTo--> Organism 