Shark is a type of Cheat. Shark is a type of Insect. Insect is related to Silk. 
Condition is related to Dry. Dry is similar to Solid. Crystal is a type of Solid. 
Cheat <--IsA-- Shark --IsA--> Insect <--RelatedTo--> Silk 
Condition <--RelatedTo--> Dry <--SimilarTo--> Solid <--IsA-- Crystal 