Investigator is a type of Expert. Veteran is a type of Expert. Veteran is related to Military. Military is related to Base. 
Deputy is a type of Assistant. Assistant is a type of Worker. Worker is related to Employ. 
Investigator --IsA--> Expert <--IsA-- Veteran <--RelatedTo--> Military <--RelatedTo--> Base 
Deputy --IsA--> Assistant --IsA--> Worker <--RelatedTo--> Employ 