you are likely to find Doctor in/at/on Clinic. you are likely to find Nurse in/at/on Clinic. Nurse is related to Person. Student is a type of Person. 
Undertake is a type of Initiate. Mount is a type of Initiate. Mount is a type of Organize. 
Doctor --AtLocation--> Clinic <--AtLocation-- Nurse <--RelatedTo--> Person <--IsA-- Student 
Undertake --IsA--> Initiate <--IsA-- Mount --IsA--> Organize 