I'm creating event rule, facing issues on to map the node field

Hi 

I'm trying to create a event rule, In the event I can see the node name in additional information field I want to take the data and put it to Node field, when I drag the data in regex its woring with only one node because when I drag select its hardcoded, I want to use the regex code the get the data but not able to identify where to update the code to get the data.