Cabin is related to Private. Private is related to Low. Low is related to Ground. 
Placement is related to Rank. Rank is related to Title. Title is a type of Name. Name is related to Physician. 
Cabin <--RelatedTo--> Private <--RelatedTo--> Low <--RelatedTo--> Ground 
Placement <--RelatedTo--> Rank <--RelatedTo--> Title --IsA--> Name <--RelatedTo--> Physician 