you are likely to find Explosion in/at/on Universe. Explosion is related to Bomb. you are likely to find Bomb in/at/on Army. Army is related to Military. 
Instruct is a synonym of Guide. Rule can be used for Guide. 
Universe <--AtLocation-- Explosion <--RelatedTo--> Bomb --AtLocation--> Army <--RelatedTo--> Military 
Instruct <--Synonym--> Guide <--UsedFor-- Rule 