Background is a type of Noise. Noise is a type of Trouble. 
Angry is similar to Black. Black is related to Brown. Brown is a type of Color. Color is a type of Influence. 
Background --IsA--> Noise --IsA--> Trouble 
Angry <--SimilarTo--> Black <--RelatedTo--> Brown --IsA--> Color --IsA--> Influence 