Therapist is a type of Expert. Technician is a type of Expert. 
Angel is a type of Film. Film is a type of Sheet. Sheet is a synonym of Plane. Plane is related to Arrive. 
Therapist --IsA--> Expert <--IsA-- Technician 
Angel --IsA--> Film --IsA--> Sheet <--Synonym--> Plane <--RelatedTo--> Arrive 