Location is related to Bed. Bed is related to Person. Sport is a type of Person. 
Person is related to Nurse. Nurse is related to Health. Health is related to Welfare. 
Location <--RelatedTo--> Bed <--RelatedTo--> Person <--IsA-- Sport 
Person <--RelatedTo--> Nurse <--RelatedTo--> Health <--RelatedTo--> Welfare 