Theology is a type of System. System is related to Memory. Memory is the opposite of Forget. 
Brief is a type of Outline. Outline is a type of Plan. Plan is related to Expectation. 
Theology --IsA--> System <--RelatedTo--> Memory <--Antonym--> Forget 
Brief --IsA--> Outline --IsA--> Plan <--RelatedTo--> Expectation 