Class is related to Science. Science is related to Investigation. 
Dying can cause/lead to Relief. Relief is a type of Comfort. Comfort is related to Physical. Physical is a different concept from Psychological. 
Class <--RelatedTo--> Science <--RelatedTo--> Investigation 
Dying --Causes--> Relief --IsA--> Comfort <--RelatedTo--> Physical <--DistinctFrom--> Psychological 