Sharp is a synonym of Elegant. Elegant is related to Silk. Silk is related to Material. Material is related to Tape. 
Central is related to City. you are likely to find Tower in/at/on City. Tower is related to Height. 
Sharp <--Synonym--> Elegant <--RelatedTo--> Silk <--RelatedTo--> Material <--RelatedTo--> Tape 
Central <--RelatedTo--> City <--AtLocation-- Tower <--RelatedTo--> Height 