Forehead is related to Hat. Hat is related to Home. Home is related to Habitat. 
Beef is related to Dinner. Dinner is related to Reserve. Reserve is related to Serve. Serve is related to Servant. 
Forehead <--RelatedTo--> Hat <--RelatedTo--> Home <--RelatedTo--> Habitat 
Beef <--RelatedTo--> Dinner <--RelatedTo--> Reserve <--RelatedTo--> Serve <--RelatedTo--> Servant 