Personal is related to Voice. Voice is a type of Express. Breathe is a type of Express. Breathe is a type of Convey. 
Derive is a type of Evolve. Derive is a type of Obtain. Source is a type of Obtain. 
Personal <--RelatedTo--> Voice --IsA--> Express <--IsA-- Breathe --IsA--> Convey 
Evolve <--IsA-- Derive --IsA--> Obtain <--IsA-- Source 