Food is related to Grass. Grass is a type of Unfold. 
Riot is related to Crazy. Crazy is a synonym of Mad. Mad is related to Emotion. Doubt is a type of Emotion. 
Food <--RelatedTo--> Grass --IsA--> Unfold 
Riot <--RelatedTo--> Crazy <--Synonym--> Mad <--RelatedTo--> Emotion <--IsA-- Doubt 