How to get the damager in the Entity Take Damage event?

[IceFreeze008]

I want to get the player who hits an entity so that I can find out which item the player used to hit the entity. For testing purposes, I have a SendMessage block immediately after the event, which is set to all players. In there are two books. One named "%victim" and the other one named "%damager". When I hit the entity (a zombie) with a sword or my hand, the chat shows the name of the entity (all good so far) and then just "%damager" and not the name of the player, as I would have expected. What am I doing wrong?

The Code:


The Chat:

 

[IceFreeze008]

Update: I solved it by moving the whole code into the player event "Player Damage Entity Event". Now I can just use %victim for the entity and %default for the player.