Radical is a type of Person. you are likely to find Person in/at/on Trouble. Trouble is part of Life. Life can be Brutal. 
Illness is a different concept from Health. Health is related to Physical. Physical is related to Dead. Dead is related to Diagnosis. 
Radical --IsA--> Person --AtLocation--> Trouble --PartOf--> Life --HasProperty--> Brutal 
Illness <--DistinctFrom--> Health <--RelatedTo--> Physical <--RelatedTo--> Dead <--RelatedTo--> Diagnosis 