Mouse is related to Cat. Cat is related to Curiosity. 
Emotion is part of Mind. Emotion is related to Sad. Sad is a synonym of Low. Low is related to Peasant. 
Mouse <--RelatedTo--> Cat <--RelatedTo--> Curiosity 
Mind <--PartOf-- Emotion <--RelatedTo--> Sad <--Synonym--> Low <--RelatedTo--> Peasant 