Conclude is a synonym of Reason. Calculate is a type of Reason. Add is a type of Calculate. 
Hurricane have Eye. Hurricane can cause/lead to Disaster. Disaster is related to Earthquake. Earthquake is related to Fault. 
Conclude <--Synonym--> Reason <--IsA-- Calculate <--IsA-- Add 
Eye <--HasA-- Hurricane --Causes--> Disaster <--RelatedTo--> Earthquake <--RelatedTo--> Fault 