Southeast is similar to Northeast. Northeast is similar to Northwest. 
System is related to Health. Health is related to Fit. Fit is related to Gym. Gym is related to Fitness. 
Southeast <--SimilarTo--> Northeast <--SimilarTo--> Northwest 
System <--RelatedTo--> Health <--RelatedTo--> Fit <--RelatedTo--> Gym <--RelatedTo--> Fitness 