title: How do I insert a comma before a date in an URL?
body: <p>So I have approx. 8.000 URLs, and most of them are missing a comma before their date-part, and I need that damn comma to pass my undergrad. </p>
  
  <p>Examples:</p>
  
  <p>(...)<code>_employee_declarations_legal_complaint_and_motions_2009</code> (should be: motions,_2009)<br>
  (...)<code>/wiki/Xinhua_Presidential_Express_18_Jun_2009</code> (should be: Express,_18_Jun_2009)
  (...)<code>guide_for_law_enforcement_23_Dec_2008</code> (should be: enforcement,_23_Dec_2008) </p>
  
  <p>And so on. I need to insert the commas automatically in Excel. Is that even possible? Could you tell it to insert a comma before a ## _ text _ #### or something like that? Replace won't work, when it's different dates. </p>
  
  <p>The biggest problem is, that I'm not a programmer. I'm an undergraduate political science major trying to do a statistical analysis of WikiLeaks. </p>
  
  <p>BTW: The problem is not that I imported it wrong (from CSV to Excel), there's lots of commas other places. The problem is that I use import.io as a datascraper, and it's probably their bug. </p>