CN ID

I am trying to add the affected_name to my email notification. In the bottom part of this script, how do get the CN id so I am accessing the correct related affected items in the script below?

 <Item type="a_CN" action="get" select="id,cn_number,title,a_businessunit,customer(keyed_name),top_assy_pn(keyed_name),team_id,change_reason,change_summary">
 <id>${Item/id}</id>
 <team_id>
 <Item type="Team" action="get">
 <Relationships>
 <Item type="Team Identity" action="get">
 <team_role>52C5CF6C021A443D845CF6F623EF48C4</team_role>
 <related_id>
 <Item type="Identity" action="get" select="name"></Item>
 </related_id>
 </Item>
 </Relationships>
 </Item>
 </team_id>
</Item>
 <Item type="a_CN_Affected_Item" action="get" source_id="${a_CN/id} select="affected_name">
</Item>