Interview is related to Selection. Selection is related to Department. Department is related to Business. Business is related to Contract. 
Vary is related to Change. Specialize is a type of Change. Specialty is derived from Specialize. 
Interview <--RelatedTo--> Selection <--RelatedTo--> Department <--RelatedTo--> Business <--RelatedTo--> Contract 
Vary <--RelatedTo--> Change <--IsA-- Specialize <--DerivedFrom-- Specialty 