Valley is a type of Stadium. Valley is related to Ranch. Ranch is a different concept from Farm. 
Person does not want (to) Refugee. Spy is a type of Person. Spy is a type of Worker. 
Stadium <--IsA-- Valley <--RelatedTo--> Ranch <--DistinctFrom--> Farm 
Refugee <--NotDesires-- Person <--IsA-- Spy --IsA--> Worker 