Earnings is derived from Earn. Earnings is related to Pay. Pay is a type of Be. Wash is a type of Be. 
you are likely to find Entertainment in/at/on Casino. you are likely to find Chip in/at/on Casino. Chip is a type of Approach. Approach is a type of Similarity. 
Earn <--DerivedFrom-- Earnings <--RelatedTo--> Pay --IsA--> Be <--IsA-- Wash 
Entertainment --AtLocation--> Casino <--AtLocation-- Chip --IsA--> Approach --IsA--> Similarity 