Calculation is a type of Planning. Agreement is a type of Planning. Agreement is related to Mortgage. 
Sacrifice is a type of Film. you are likely to find Role in/at/on Film. Role is related to Chief. 
Calculation --IsA--> Planning <--IsA-- Agreement <--RelatedTo--> Mortgage 
Sacrifice --IsA--> Film <--AtLocation-- Role <--RelatedTo--> Chief 