Person does not want (to) Unknown. Key is a type of Person. you are likely to find Key in/at/on Idea. Idea is related to Insight. 
Corner is a type of Turn. Corner is a type of Control. Control is a synonym of Check. Check is a type of Defend. 
Unknown <--NotDesires-- Person <--IsA-- Key --AtLocation--> Idea <--RelatedTo--> Insight 
Turn <--IsA-- Corner --IsA--> Control <--Synonym--> Check --IsA--> Defend 