Bell is related to Implement. Iron is a type of Implement. Iron is related to Eye. 
Marriage is a type of Ritual. Marriage is related to Holy. Holy is related to Union. Union is a type of Set. 
Bell <--RelatedTo--> Implement <--IsA-- Iron <--RelatedTo--> Eye 
Ritual <--IsA-- Marriage <--RelatedTo--> Holy <--RelatedTo--> Union --IsA--> Set 