White is related to Captain. Captain is related to Naval. Naval is related to Commander. 
Must is related to Ought. Ought is related to Responsibility. Fault is a type of Responsibility. Fault is a synonym of Stumble. 
White <--RelatedTo--> Captain <--RelatedTo--> Naval <--RelatedTo--> Commander 
Must <--RelatedTo--> Ought <--RelatedTo--> Responsibility <--IsA-- Fault <--Synonym--> Stumble 