<div class="entry-thumbnail">
<a href="<?php the_permalink()?>" title="<?php  the_title(); ?>">
<?php if(function_exists('get_wp_lazy_loading_blank_image')){ ?>
<img width="348" height="232"  class="lazy attachment-size-featured wp-post-image" data-original="<?php echo get_the_post_thumbnail() ?>" src="<?php echo get_wp_lazy_loading_blank_image(); ?>"  />
<?php } else { ?>
<img width="348" height="232" src="<?php echo get_the_post_thumbnail() ?>" class="attachment-size-featured wp-post-image" />
<?php } ?>
</a>
</div>