Decline is a type of Condition. Loss is a type of Decline. Loss is related to Exercise. you are likely to find Exercise in/at/on Gym. 
Bell is a type of Sound. Bell is related to Big. Big is related to Vessel. Vessel is related to Craft. 
Condition <--IsA-- Decline <--IsA-- Loss <--RelatedTo--> Exercise --AtLocation--> Gym 
Sound <--IsA-- Bell <--RelatedTo--> Big <--RelatedTo--> Vessel <--RelatedTo--> Craft 