Ad blocker - how to remove ad space?

I'm currently building an ad blocker. How do I configure it to remove the spaces where ads appear. I saw example

{
     "action": {
          "type": "css-display-none",
          "selector": "#someCssElement" 
     },
     "trigger": { 
          "if-domain": ["blahblah.com"], 
          "url-filter": ".*"
     } 
}

This rule will hide div <div id="links">

But i can't understand how can i build filter for examples like this:

<div class="placeholder h250" data-stat-type="media" data-stat-value="61015dfbf96595540436fb21">

How do I configure it to remove the spaces where ads appear?