split string -- fourth instance of character

[illmatic]

I'm having a bit of issue using the split function to isolate the site URL from an item URL that I obtain through a trigger from a document library.   Initially, I was splitting on the "_" as the URL that I previously retrieved had " _layouts" in it.  Apparently, '_layouts' isn't included in the item URL for image and pdf files.   Is there a way to split based on "/" but at a specific interval/instance of the "/"?

Here is the itemURL:  

https://contoso.sharepoint.com/sites/Program/Project/ProjectArtifacts/Forms/AllItems.aspx#id=%2Fsite..."

I would like to split so that it captures the following:
https://contoso.sharepoint.com/sites/Program/Project

Thanks for all and any help!

[Paulie78 · Accepted solution]

Try this:

join(take(split(outputs('URL'), '/'),6), '/')

[illmatic]

Thank you!  This worked perfectly.