Tragedy is related to Sad. Sad is a synonym of Uncomfortable. 
Weapon can be used for Punishment. Punishment is related to Connection. Connection is etymologically related to Direction. Direction is related to Left. 
Tragedy <--RelatedTo--> Sad <--Synonym--> Uncomfortable 
Weapon --UsedFor--> Punishment <--RelatedTo--> Connection --EtymologicallyRelatedTo--> Direction <--RelatedTo--> Left 