Theological is related to Theory. Theory is related to Grand. Grand is similar to Important. Important is the opposite of Light. 
you are likely to find Gentleman in/at/on Restaurant. Restaurant have Bathroom. you are likely to find Bathroom in/at/on Airport. 
Theological <--RelatedTo--> Theory <--RelatedTo--> Grand <--SimilarTo--> Important <--Antonym--> Light 
Gentleman --AtLocation--> Restaurant --HasA--> Bathroom --AtLocation--> Airport 