How to limit the host name coming in the output as only one entry and not multiple times in props.conf?

[ethanthomas]

My sample events are like this 

event 1

My name is Ethan [host="asw.pbrfinance.sdo.dgr.com"]

My address is 46e 91 st [host="asw.pbrfinance.sdo.dgr.com"]

my city is Atlanta [host="asw.pbrfinance.sdo.dgr.com"]

event 2

My name is Thomas [host="asw..sdo.dgr.cowq234wdwaf.mhh.com"]

My address is 996e 97 st [host="asw..sdo.dgr.cowq234wdwaf.mhh.com"]

my city is Atlanta [host="asw..sdo.dgr.cowq234wdwaf.mhh.com"]

I want to limit the host name coming in the output as only one entry and not multiple times . Is there anyway to do this in props .conf ? Please help me with a proper regex for this . 

Expected output 

event 1

My name is Ethan [host="asw.pbrfinance.sdo.dgr.com"]

My address is 46e 91 st 

my city is Atlanta

[richgalloway]

The props.conf file is for inputs, not outputs.  Splunk has no way of knowing at input-time if any particular value is a duplicate or not.

It's not clear how the one output event is derived from the two input events. 

What problem are you trying to solve?