Van is related to Deliver. Deliver is the opposite of Keep. 
Diversity is a type of Condition. Health is a type of Condition. Health is related to Nurse. Nurse is related to Profession. 
Van <--RelatedTo--> Deliver <--Antonym--> Keep 
Diversity --IsA--> Condition <--IsA-- Health <--RelatedTo--> Nurse <--RelatedTo--> Profession 