you are likely to find Mirror in/at/on Wall. Mirror is related to Silver. 
Frontier is a synonym of Border. Border is related to National. National is a synonym of Citizen. Citizen is related to Member. 
Wall <--AtLocation-- Mirror <--RelatedTo--> Silver 
Frontier <--Synonym--> Border <--RelatedTo--> National <--Synonym--> Citizen <--RelatedTo--> Member 