MarkLogic template driven extraction and triples: forming triples between array nodes

This is a follow-up to my question here: MarkLogic template driven extraction and triples: dealing with array nodes

So let's say I have a number of documents structured like this:

declareUpdate();

xdmp.documentInsert(
       '/test/tde.json',
       {
         content: {
           name:'Joe Parent',
           children: [
             {
               name: 'Bob Child'
             },
             {
               name: 'Sue Child'
             },
             {
               name: 'Guy Child'
             }
           ]
         }
       },
       {permissions : xdmp.defaultPermissions(),
        collections : ['test']})

I want to define a template that would extract triples from these documents defining sibling relationships between the children. For the above example, I would want to extract the following triples (the relationship is two-way):

Bob Child sibling-of Sue Child
Bob Child sibling-of Guy Child
Sue Child sibling-of Bob Child
Sue Child sibling-of Guy Child
Guy Child sibling-of Bob Child
Guy Child sibling-of Sue Child

How can i set up my template to accomplish this?

Thanks!