Require is a synonym of Command. Officer is a type of Command. Chairman is a type of Officer. 
Milk is related to Liquid. Liquid is related to Soup. Soup is related to Juice. Juice is related to Fruit. 
Require <--Synonym--> Command <--IsA-- Officer <--IsA-- Chairman 
Milk <--RelatedTo--> Liquid <--RelatedTo--> Soup <--RelatedTo--> Juice <--RelatedTo--> Fruit 