public function findRelatedEntries($entry_id, $parent_field_id)
    {
        // We have the entry_id of the entry that has the referenced tag values
        // Lets find out what those handles are so we can then referenced the
        // child section looking for them.
        $handles = Symphony::Database()->fetchCol('handle', sprintf("
            SELECT `handle`
            FROM `tbl_entries_data_%d`
            WHERE `entry_id` = %d
        ", $parent_field_id, $entry_id));

        $ids = Symphony::Database()->fetchCol('entry_id', sprintf("
            SELECT `entry_id`
            FROM `tbl_entries_data_%d`
            WHERE `handle` IN ('%s')
        ", $this->get('id'), implode("','", $handles)));

        return $ids;
    }