Generation is related to Boom. Boom is etymologically related to Beam. Beam is related to Structural. Structural is related to Column. 
Killing can cause/lead to Suicide. Bullet can be used for Killing. 
Generation <--RelatedTo--> Boom --EtymologicallyRelatedTo--> Beam <--RelatedTo--> Structural <--RelatedTo--> Column 
Suicide <--Causes-- Killing <--UsedFor-- Bullet 