Inspector is a type of Policeman. Policeman is derived from Man. Man is related to Builder. Builder is related to Profession. 
Ear is related to Sound. Speak is a type of Sound. 
Inspector --IsA--> Policeman --DerivedFrom--> Man <--RelatedTo--> Builder <--RelatedTo--> Profession 
Ear <--RelatedTo--> Sound <--IsA-- Speak 