Face is related to Hair. Hair is related to Bear. 
Eat is related to Health. Health is related to Nurse. Nurse is related to Assistant. Aide is a type of Assistant. 
Face <--RelatedTo--> Hair <--RelatedTo--> Bear 
Eat <--RelatedTo--> Health <--RelatedTo--> Nurse <--RelatedTo--> Assistant <--IsA-- Aide 