Soft is related to Wood. Wood is related to Natural. 
Ship is related to Vessel. Vessel is related to Military. Military is related to Service. Utility is a type of Service. 
Soft <--RelatedTo--> Wood <--RelatedTo--> Natural 
Ship <--RelatedTo--> Vessel <--RelatedTo--> Military <--RelatedTo--> Service <--IsA-- Utility 