Class is related to Working. Working can cause/lead to Stress. Lawsuit can cause/lead to Stress. 
Employer is related to Boss. Boss is a synonym of Head. Head is the opposite of Base. Basement is derived from Base. 
Class <--RelatedTo--> Working --Causes--> Stress <--Causes-- Lawsuit 
Employer <--RelatedTo--> Boss <--Synonym--> Head <--Antonym--> Base <--DerivedFrom-- Basement 