Get meta data from publish guardian

So I’m in a single web page and I need to get some meta data from a guardian web page. This code is inside my footer.php:

if (is_single()) {
    international $publish;
    $guardian = get_post_achestor ( $post->ID );
    $some_value = get_post_meta( $guardian, 'some_metabox_param', true);
}

It isn’t working folks, are you able to please take a look?

UPDATE: the guardian web page in query is template that has this loop

<?php query_posts( 'post_type=publish&posts_per_page=5&paged=1' ); 
if ( have_posts() ) : international $extra; ?>              
<div class="gadgets">
    <?php whereas ( have_posts() ) : the_post(); $extra = 0; ?>
         <?php get_template_part( 'content material', get_post_format() ); ?>
     <?php endwhile; ?>
     </div>
 <?php endif; ?>