Diamond can be used for Attraction. Attention is a type of Attraction. Attention is a type of Work. Work is related to Union. 
Mall is related to Crowd. Crowd is related to Huge. 
Diamond --UsedFor--> Attraction <--IsA-- Attention --IsA--> Work <--RelatedTo--> Union 
Mall <--RelatedTo--> Crowd <--RelatedTo--> Huge 