Small is related to Town. Town is related to Hill. Hill is related to Climb. Climb is related to Vertical. 
Alarm is a type of Weapon. Weapon is related to Rifle. Rifle is related to Trigger. 
Small <--RelatedTo--> Town <--RelatedTo--> Hill <--RelatedTo--> Climb <--RelatedTo--> Vertical 
Alarm --IsA--> Weapon <--RelatedTo--> Rifle <--RelatedTo--> Trigger 