Identify is a synonym of Key. Key can be used for Opening. 
War is a synonym of Battle. Battle is related to Big. Big is related to Soup. you are likely to find Soup in/at/on Supermarket. 
Identify <--Synonym--> Key --UsedFor--> Opening 
War <--Synonym--> Battle <--RelatedTo--> Big <--RelatedTo--> Soup --AtLocation--> Supermarket 