Shout is related to Volume. Volume is a type of Quantity. Variable is a type of Quantity. Variable is the opposite of Constant. 
Homework can cause/lead to Frustration. Homework is similar to Assignment. Assignment is a synonym of Station. Western is a type of Station. 
Shout <--RelatedTo--> Volume --IsA--> Quantity <--IsA-- Variable <--Antonym--> Constant 
Frustration <--Causes-- Homework <--SimilarTo--> Assignment <--Synonym--> Station <--IsA-- Western 