I am having trouble getting the children of a Parent.Parent

The structure of the site is as follows.

TOP LEVEL -> has one 'PlayerSites' -> has many -> 'PlayerSite' -> has one -> 'NewsHolder -> has many 'NewsPage'

So on the 'PlayerSite' page I am getting all the 'NewsPage' items displayed in a list using this function in PlayerSite.PHP

public function PlayerVidNews() {
    $playervidnews = DataObject::get_one("PlayerSite");
    return ($playervidnews) ? DataObject::get("NewsHolder", "ParentID=" . $this->ID, "") : false;
   }

..and then

<% control PlayerVidNews %>
         
         <% control Children %>

   <% end_control %>
         
<% end_control %>

What I want to do is click on one of the 'NewsPage' items from 'PlayerSite' page, which goes to a 'NewsPage' page. On this 'NewsPage' page I also want to display a list of all the other 'NewsPage' items that belong to that particular 'PlayerSite'. However I cant seem to get just those 'NewsPage' items that belong to that particular 'Playersite'.

I have tried putting the same function in NewsPage.PHP And NewsHolder.PHP. But this returns nothing or all 'NewsPage' items, regardless of which 'PlayerSite' they belong to.

public function PlayerVidNews() {
    $playervidnews = DataObject::get_one("PlayerSite");
    return ($playervidnews) ? DataObject::get("NewsHolder", "ParentID=" . $this->ID, "") : false;
   }

... can anyone advise how i might get just those 'NewsPage' items that belong to that particular 'PlayerSite'

Thanks.

this is what i needed. Basic stuff i know. but now i think i will be able to manipulate the data just as i need. I will let you know.