Student is a type of Person. Person is related to Nurse. you are likely to find Nurse in/at/on Clinic. you are likely to find Doctor in/at/on Clinic. 
Call is related to Name. Name is related to Animal. Animal is related to Deer. 
Student --IsA--> Person <--RelatedTo--> Nurse --AtLocation--> Clinic <--AtLocation-- Doctor 
Call <--RelatedTo--> Name <--RelatedTo--> Animal <--RelatedTo--> Deer 