Capital is a type of Top. Capital is related to Building. Building is related to City. City is related to Entity. 
Signature is a type of Name. Name is related to Main. Main is related to Popular. Popular is related to Fame. 
Top <--IsA-- Capital <--RelatedTo--> Building <--RelatedTo--> City <--RelatedTo--> Entity 
Signature --IsA--> Name <--RelatedTo--> Main <--RelatedTo--> Popular <--RelatedTo--> Fame 