Mask is related to Terror. Terror is related to War. Glory is part of War. 
Sword can be used for Killing. Sword is related to Metal. Metal is related to Machine. Robot is a type of Machine. 
Mask <--RelatedTo--> Terror <--RelatedTo--> War <--PartOf-- Glory 
Killing <--UsedFor-- Sword <--RelatedTo--> Metal <--RelatedTo--> Machine <--IsA-- Robot 