Relax requires Comfortable. Comfortable is derived from Comfort. Comfort is related to Bed. 
Happy is the opposite of Upset. Upset is derived from Set. Conspiracy is a type of Set. 
Relax --HasPrerequisite--> Comfortable --DerivedFrom--> Comfort <--RelatedTo--> Bed 
Happy <--Antonym--> Upset --DerivedFrom--> Set <--IsA-- Conspiracy 