Banker is related to Owner. Owner is related to Land. Land is related to Common. Common is a different concept from Unusual. 
Vaccine is a type of Medicine. Medicine is a type of Treatment. Treatment is related to Permanent. Permanent is related to Power. 
Banker <--RelatedTo--> Owner <--RelatedTo--> Land <--RelatedTo--> Common <--DistinctFrom--> Unusual 
Vaccine --IsA--> Medicine --IsA--> Treatment <--RelatedTo--> Permanent <--RelatedTo--> Power 