City can be used for Protection. City is related to Business. Business is related to Capital. Capital is related to Entity. 
Melt is a type of Weaken. Melt is a synonym of Disappear. Disappear is related to Rub. Rubber is derived from Rub. 
Protection <--UsedFor-- City <--RelatedTo--> Business <--RelatedTo--> Capital <--RelatedTo--> Entity 
Weaken <--IsA-- Melt <--Synonym--> Disappear <--RelatedTo--> Rub <--DerivedFrom-- Rubber 