Aid is related to Hurt. Hurt is a synonym of Suffer. Freeze is a type of Suffer. Freeze is a synonym of Hang. 
you are likely to find Key in/at/on Pocket. Key is a type of Explanation. Proof is a type of Explanation. Proof is a type of Impression. 
Aid <--RelatedTo--> Hurt <--Synonym--> Suffer <--IsA-- Freeze <--Synonym--> Hang 
Pocket <--AtLocation-- Key --IsA--> Explanation <--IsA-- Proof --IsA--> Impression 