Front is a type of Appearance. Front is a synonym of Presence. 
Old is related to Market. Market is related to Center. Center is a synonym of Concentrate. Steep is a type of Concentrate. 
Appearance <--IsA-- Front <--Synonym--> Presence 
Old <--RelatedTo--> Market <--RelatedTo--> Center <--Synonym--> Concentrate <--IsA-- Steep 