Message is a type of Communicate. Message is related to Paper. you are likely to find Paper in/at/on Garbage. Garbage is similar to Trash. 
Length is related to Sword. Sword is related to Fish. Fish is related to Pet. 
Communicate <--IsA-- Message <--RelatedTo--> Paper --AtLocation--> Garbage <--SimilarTo--> Trash 
Length <--RelatedTo--> Sword <--RelatedTo--> Fish <--RelatedTo--> Pet 