Crucial is a synonym of Excellent. Excellent is related to Superior. Superior is related to Dominant. 
Kingdom is a type of Sphere. Sphere is related to Influence. Exposure is a type of Influence. 
Crucial <--Synonym--> Excellent <--RelatedTo--> Superior <--RelatedTo--> Dominant 
Kingdom --IsA--> Sphere <--RelatedTo--> Influence <--IsA-- Exposure 