Love is related to Spouse. Husband is a type of Spouse. Husband is related to Bill. Bill is related to Cost. 
Flour is related to Grain. Grain is related to Category. 
Love <--RelatedTo--> Spouse <--IsA-- Husband <--RelatedTo--> Bill <--RelatedTo--> Cost 
Flour <--RelatedTo--> Grain <--RelatedTo--> Category 